Remove RedCloth and no longer allow bundle-audit to fail

As far as I can see, RedCloth wasn't used at all.

See merge request !2037

When rendering the clone page, check user profile to decide default
clone protocol

If the user has uploaded SSH-keys, use SSH; otherwise, use http(s).

Closes #3504.

See merge request !1998

Signed in Admin can add/remove himself to a group/project

Fixes #3640 

/cc @JobV Could you have a look as well?

See merge request !1942

Remove the prepended v on GitLab Workhorse upgrade doc

Fix for https://gitlab.com/gitlab-org/gitlab-workhorse/issues/4



See merge request !2020

Merge when build succeeds

### What does this MR do?
Adds a button to a MR when the build/ci is running so it can be merged when/if the build is successfull.

### Are there points in the code the reviewer needs to double check?
English spelling and whether or not the grammer is correct.

### Why was this MR needed?
When you expect its all good, and don't want to revisit the current MR it can be accepted allready.

### What are the relevant issue numbers / Feature requests?
Fixes #2640 -- although `Merge if green` is replaced with `Merge when the build succeeds` the general idea is the same.

### Screenshots (if relevant)
![Screenshot_from_2015-12-07_10-34-39](/uploads/b90b558b6ad6c8266bc9c96120d86f96/Screenshot_from_2015-12-07_10-34-39.png)

![Screenshot_from_2015-11-02_17-26-56](/uploads/9f52f56e3c5e9ec63cb8f42978c92a52/Screenshot_from_2015-11-02_17-26-56.png)
![Screenshot_from_2015-11-02_17-27-03](/uploads/119fc18c9b15ff73dc38010ac5b6244a/Screenshot_from_2015-11-02_17-27-03.png)

![Screenshot_from_2015-12-03_10-08-14](/uploads/bad7b35c7d129981d43631877c958be0/Screenshot_from_2015-12-03_10-08-14.png)

![Screenshot_from_2015-11-02_17-27-16](/uploads/b616d750a16cc11ba72f2ca84213515e/Screenshot_from_2015-11-02_17-27-16.png)

### Further considerations
What if there are minor things needed solving, e.g. Rubocop, the current implementation will reset the approved status of the MR. It might be a consideration keep the approval for team member, or even guests. This would require an extra option in the Admin screen, though might add extra value.

#### TODO
- [x] Docs
- [x] Specs

/cc @DouweM @rspeicher

See merge request !1729

Introduce CI documentation for services and languages

This introduces guide for PHP, a bunch of services (databases) and cleans up some docker references.

With this there are bunch of example projects in https://gitlab.com/groups/gitlab-examples.

/cc @JobV @axil 

See merge request !1917

# Conflicts:
#	app/controllers/projects/merge_requests_controller.rb
#	config/routes.rb

Update annotations



See merge request !2033

Fix only 20 group members showing on project member page
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !2030

Move ssh-key steps into SharedUser. Change references in "Explore Projects" feature. Apply ssh-key requirement to "Project Create" feature.

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Add Builds tab to MR detail page

## Before

![Screen_Shot_2015-12-08_at_13.21.04](/uploads/0d26060bef78f3de076e33439b8a4789/Screen_Shot_2015-12-08_at_13.21.04.png)

## After

![Screen_Shot_2015-12-08_at_13.25.20](/uploads/be7d7fd6d4fc8c5cc366b5b3778b813a/Screen_Shot_2015-12-08_at_13.25.20.png)

Fixes #3907

See merge request !2016

Default target branch to patch-n when editing file in protected branch

Fixes #3441

See merge request !2021

Update documentation about automatic issue closing

RE !1933

See merge request !2000

https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/1917#note_2833978

# Conflicts:
#	app/views/projects/merge_requests/widget/_heading.html.haml
#	app/views/projects/merge_requests/widget/open/_accept.html.haml

# Conflicts:
#	app/controllers/projects/merge_requests_controller.rb
#	app/views/projects/merge_requests/widget/_heading.html.haml

Make cross-project reference's clipboard target less naive

See !2023

See merge request !2024

See !2023

Make tab target selectors less naive

Prior, any of the specified IDs could have been hijacked by a table of
contents header, breaking the tab functionality. For example, a `##
Notes` header would get the id `notes` and prevent the Discussion tab
from being activated.

Closes #3908

See merge request !2023

Prior, any of the specified IDs could have been hijacked by a table of
contents header, breaking the tab functionality. For example, a `##
Notes` header would get the id `notes` and prevent the Discussion tab
from being activated.

Closes #3908