Add omnibus rake task

## Why was this MR needed?
There was no omnibus example

## Does this MR meet the acceptance criteria?

- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)


See merge request !5416

Add some clarification for some files under config/*

Add some clarification for some files under config/*

I didn't add a lot of them because I am not very familiar about how they
work and I am not sure if we really need to explain files like
config/database.yml because if you know Rails you must know how
that works.

At any rate, I think this is a beginning and we could keep documenting
more files in the future.

Closes #18373

See merge request !4851

Fix deselecting calendar days on contribution graph

## What does this MR do?
Fix deselecting calendar days on contribution graph

## Are there points in the code the reviewer needs to double check?
Shouldn't be

## Why was this MR needed?
In `master`, you can currently deselect a calendar day after selecting but you cannot reselect that day.

## Screenshots (if relevant)
Before:
![2016-10-25_10.42.20](/uploads/7d442c09cd15082cf69f673a544b56f9/2016-10-25_10.42.20.gif)

After:
![2016-10-25_10.40.35](/uploads/6123365f0ec63ee84658ee6057e7715c/2016-10-25_10.40.35.gif)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?
Closes #22381

See merge request !6453

Merge branch '24161-non-intuitive-buttons-for-import-sources-in-administrator-settings-enable-disable' into 'master'

Import sources buttons to checkboxes

## What does this MR do?

Swaps the `/application_settings` `Import Sources` buttons to checkboxes.

## Are there points in the code the reviewer needs to double check?

## Why was this MR needed?

## Screenshots (if relevant)

![2016-11-19_14.42.39](/uploads/5bf53ecb54765bd80ab275714208ee9a/2016-11-19_14.42.39.gif)

## Does this MR meet the acceptance criteria?

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?


Closes #24161

See merge request !7598

Update github.md

Hi, I ran into a few pitfalls while I enabled OmniAuth to be able to migrate repos from github to my omnibus-gitlab instance today, so here are my findings:

These docs state thate the default authorization callback URL is `'${YOUR_DOMAIN}/import/github/callback'`, but the screenshot only shows `'${YOUR_DOMAIN}'`, which works, so I removed the ambiguity.

When editing `gitlab_rails['omniauth_providers']` for github.com, you have to omit the `"url" => "https://github.com/",` part, otherwise it won't work (OmniAuth will stay deactivated). This is backed by the configuration details of the "from-source-installation" which also omits the url in the `yml` file.

After changing the `gitlab.rb` file, `sudo gitlab-ctl reconfigure` needs to be run, which is missing in the docs.

Following the updated version of this documentation I was able to enable OmniAuth.

If anything I edited is wrong, please correct me, as I don't know how the "from-source-installations" would react to my changes.

Best regards,
Florian

See merge request !4072

Reduce size of images in docs from 25MB to 13MB using pngquant

- Previous MR that used zopflipng https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/4325
- Similar MR to another repo https://gitlab.com/gitlab-com/www-gitlab-com/merge_requests/3232


See merge request !7679

Fix NPM install warnings due to incompatible dependency version

## What does this MR do?

Rolls back `eslint-plugin-import` to semver `^1.16.0` for compatibility with `eslint-config-airbnb`.

## Are there points in the code the reviewer needs to double check?

Shouldn't be.

## Why was this MR needed?

A warning message was being generated every time we run `npm install`, and there are possibly other side effects due to module incompatibility.

## Does this MR meet the acceptance criteria?

- [x] All builds are passing
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)

## What are the relevant issue numbers?

Closes #24754

See merge request !7641

Disabled award emoji button when user is not logged in

## What does this MR do?

The award emoji buttons are now disabled when the user is not signed in, stopping them from clicking it & then getting an error.

## Screenshots (if relevant)

![Screen_Shot_2016-11-22_at_10.25.20](/uploads/210378bde90e689fbc12940ce271c05e/Screen_Shot_2016-11-22_at_10.25.20.png)

## What are the relevant issue numbers?

Closes #24680

See merge request !7651

Fix exceptions when loading build trace

## What does this MR do?

This MR fixes exceptions when loading build trace.

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [x] Tests added for this feature/bug

## What are the relevant issue numbers?

Closes #24638

See merge request !7658

Resolve "Labeling system notes downcase labels"

## What does this MR do?
This MR fixes issues of label gets lowercase in system note as describe in #24737

## Are there points in the code the reviewer needs to double check?
NR
## Why was this MR needed?
This MR fixes the regression of becoming labels and its description and title lowercase in system note
  
## Screenshots (if relevant)
**Before:**
![before](/uploads/ac99fd5d1219ee3b4b7c699319267087/before.png)

**After:** 
![after](/uploads/d1b6413c857d18f122252f421ac498b0/after.png)

## Does this MR meet the acceptance criteria?

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?


Closes #24737 
Closes #24751

See merge request !7636

Took it from https://gitlab.com/gitlab-com/www-gitlab-com/merge_requests/3232

[ci skip]

Add changes to JIRA api docs

See merge request !7675

shows unconfirmed email status in profile

## What does this MR do?
This MR closes #24413 
## Are there points in the code the reviewer needs to double check?
NR

## Why was this MR needed?
When modifying an account email address in profile settings a new confirmation email is sent,  and shows the information that s/he got an email to confirm.
 
## Screenshots (if relevant)
**Before**
![2016-11-22_19.54.51](/uploads/361fd605a3c1e997a58defe45a63081a/2016-11-22_19.54.51.gif)

**After**
![2016-11-22_20.01.21](/uploads/6b07663f71d6684d2138798920cf07af/2016-11-22_20.01.21.gif)

## Does this MR meet the acceptance criteria?

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?


Closes #24413

See merge request !7611

Last minute CI Style tweaks for 8.14

## What does this MR do?
- Skipped builds now have use a lighter gray.
- Converted all status icons to be managed by scss colors only
- Consolidated all status icon styles into icons.scss
- Deleted any classes or styles within the svg's
- Gave status badges a hover style, but only if clickable
- Fixed alignment issue mini-pipeline graph

## Are there points in the code the reviewer needs to double check?

## Why was this MR needed?
As per the discussion in the slack chat https://gitlab.slack.com/archives/ci/p1479743986004879

## Screenshots (if relevant)
- skipped builds:
![image](/uploads/f59c615045472b9b13940463a64c8038/image.png)
![image](/uploads/26503d1da9c93b3c22c5c0c1369feceb/image.png)

- hover style status badges:
![2016-11-22_00.21.27](/uploads/36afa7aa64d60e1755bf39d97f90c59f/2016-11-22_00.21.27.gif)![2016-11-22_00.58.38](/uploads/1d95fa5db124412d3f83b3e79b9b71ec/2016-11-22_00.58.38.gif)

- mini pipeline graph:

before:
![image](/uploads/38e5e57ada3907b17c6e24e1446b4514/image.png)


after:
![image](/uploads/de4476693a1397eebfc680661159daf7/image.png)


## Does this MR meet the acceptance criteria?

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [ ] All builds are passing
- [ ] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [ ] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [ ] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

See merge request !7643

[ci skip]

See merge request !7676

[ci skip]

fixed bug to do with calculating durations

Fixes a couple of small bugs while calculating durations in cycle analytics - probably due to some bad refactoring

- [ ] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- Tests
  - [x] Added for this feature/bug
  - [ ] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/24796

See merge request !7663

[ci skip]

Merge branch '24804-wrong-render-index-should-be-render-show-in-projects-pipelinessettingscontroller-update' into 'master'

Resolve "Wrong `render 'index'`, should be `render 'show'` in `Projects::PipelinesSettingsController#update`"

Closes #24804

See merge request !7665

See merge request !7672

Issue creation now accepts trailing whitespace

See merge request !7633

Add shortcuts for adding users to a project team with a specific role

Closes #20944

See merge request !7565

Do not use MergeRequest#commits in define_pipelines_vars

## What does this MR do?

`MergeRequest#commits` requires merge_request_diff to be present.
This is not the case when creating a new merge request.

## What are the relevant issue numbers?

Fix up for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7568

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/24798

See merge request !7664

Allow admins to stop impersonating users without e-mail addresses

Closes #24576

See merge request !7550

Fix IID filter for merge requests and milestones

I updated the example in the docs and added a test. The milestones API was also broken for the same reason.

Related to !7358 and !7373

See merge request !7648

Handle orphans when removing soft deleted groups

This fixes the migration from https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7528 so it handles orphans as mentioned in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7528/diffs#note_18800962.

This needs to go in 8.14.0 as otherwise customers may run into the same problem.

See merge request !7657

Add new image for Cycle Analytics

See merge request !7666

Add concern for reuse pagination params declaration in API

Closes #23532

See merge request !7646

[ci skip]

Signed-off-by: Rémy Coutable <remy@rymai.me>

Revert "Merge branch 'docs/jira-old' into 'master'"

See merge request !7531

MergeRequest#commits requires merge_request_diff to be present.
This is not the case when creating a new merge request.

There may be more tables but these were the tables that were problematic
for GitLab.com due to foreign key constraints (without cascading
deletes).