And remove mutual votes.

# Conflicts:
#	app/assets/javascripts/notes.js.coffee

To render emoji in the emoji bar of an issue or MR we actually need the emoji unicode and unicode info is stored in the emoji menu widget. That widget could only be visible if user clicks the "Add" button and there may not be a widget when posting emoji only comments. So this change will check existence of the widget and create it before posting the emoji if it's not exist to render it correctly.

[ci skip]

This spots bugs where the menu could be in a div that has overflow hidden on ie. diff comments

# Conflicts:
#	app/views/votes/_votes_block.html.haml

Correctly adds/removes awards in notes

# Conflicts:
#	app/models/concerns/awardable.rb
#	app/views/projects/issues/show.html.haml
#	app/views/projects/merge_requests/_show.html.haml

# Conflicts:
#	app/assets/javascripts/awards_handler.coffee
#	app/assets/stylesheets/pages/notes.scss
#	app/helpers/issues_helper.rb
#	app/views/projects/notes/_note.html.haml

# Conflicts:
#	app/assets/javascripts/awards_handler.coffee
#	app/views/emoji_awards/_awards_block.html.haml

Add container registry support

Tasks:

- [x] Merge docker/distribution authentication service: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/3787
- [x] Implement Docker Registry API
- [x] Show a list of docker images in GitLab
- [x] Remove registry repository on project deletion
- [x] Support project rename, move and namespace rename
- [x] Use token when connecting the registry
- [x] Allow to delete images from GitLab
- [x] Support pushing from GitLab CI (gitlab-ci-token / $CI_BUILD_TOKEN)
- [x] Support GitLab Runner pulling for public repositories
- [ ] Support GitLab Runner pulling for private repositories
- [x] Add tests for Docker Registry API
- [x] Add tests for a views
- [x] Make texts nicer
- [x] Implement a backup support

- [ ] Create administration documentation https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/4141
- [ ] Create user documentation

See merge request !4040

# Conflicts:
#	app/controllers/projects/merge_requests_controller.rb
#	app/models/note.rb
#	db/schema.rb
#	spec/models/note_spec.rb

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

Fix atom feeds and links

1. The atom feed for a group's issues didn't work, because it had parts copied from the dashboard issues builder template.
2. The feed link from a group's activity page went to the dashboard feed, rather than the group's feed.

Closes #15640

See merge request !4191

Fix broken link in CI quickstart docs

The newline between the `[label]` and the `(link)` caused it to be interpreted literally: http://doc.gitlab.com/ce/ci/quick_start/README.html

See merge request !3541

Improve issue formatting in Slack service

This will improve the looks of the message that gets send to Slack.

**Before**

![image](https://gitlab.com/jeroenvanbaarsen/gitlab-ce/uploads/670442d4d5cef5aa36753671b8894a75/image.png)

**After**

![image](https://gitlab.com/jeroenvanbaarsen/gitlab-ce/uploads/ab6e40a0c22ebe89ebd5b3652821c6dd/image.png)

There is one thing I'm not certain about, thats sending the logo with the payload. Because this means we need to host the GitLab logo somewhere public, and every time a payload from any GitLab instance is send, we use that logo url. This might overload the server, or drive the bandwidth bill through the roof.
This is something @sytses or @dzaporozhets have to decide about.

@stanhu, you told me you were the author of the original code, maybe you can review?

See merge request !1308

Fixed typo in zen.scss and corresponding views



See merge request !4045

Make it clearer that /licenses is the OS license templates endpoint

Following the discussion on https://gitlab.com/gitlab-org/gitlab-ce/commit/13804aba867d19009ca94d820aa7ec650a509f5a#note_4961954.

Corresponding EE MR: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/407

See merge request !4188