update ci configuration to send slack notifications on failure

Updates CI config file and adds a task to send notifications when a build fails on master or on any tag.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/12805

See merge request !2681

Add "issue" to Close/Reopen buttons for clarity

_Originally opened by @andywgrant at !2884_

---

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/13549

See merge request !2929

Improve the formatting for the user page bio

Resolves #13406.

Problems, per the Issue above:
- The bio has an extra period appended by the HAML view.
- The bio isn't given its own line, not differentiated from username and account creation date.
- The bio is allowed to span almost the full width of the container, would probably look better if it were only allowed a max width of something like 750px.

This commit:
- Separates the User page bio from the username and account creation
date.
- Separates the pseudo-selector adding a Middle Dot out from the
`profile-link-holder` class and into a `middle-dot-divider` class.

Before:
![Screen_Shot_2016-02-15_at_3.55.28_PM](/uploads/fbe410c3f436740121c5f4686e0f44d0/Screen_Shot_2016-02-15_at_3.55.28_PM.png)

With this Merge Request:
![Screen_Shot_2016-02-15_at_3.55.25_PM](/uploads/b4b16376a395608f57d8f76ab47e241f/Screen_Shot_2016-02-15_at_3.55.25_PM.png)

See merge request !2827

Changed padding & background color for highlighted notes

Closes #12453

![Screen_Shot_2016-02-23_at_11.18.59](/uploads/19150d884fd1175fe0df5f6daee64206/Screen_Shot_2016-02-23_at_11.18.59.png)

See merge request !2937

Correctly aligned buttons vertical in gray-content-block

Closes #12790 

![Screen_Shot_2016-02-23_at_15.09.19](/uploads/e5c6d97d8c1712273c87a0d592430390/Screen_Shot_2016-02-23_at_15.09.19.png)

See merge request !2941

Treats activity tabs as single select

Fixes #8092

![activity-tabs](/uploads/1fb4d9233492252cfd93c74579e97514/activity-tabs.gif)

See merge request !2940

Fix look of tooltip for Revert button.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/13602

See merge request !2900

Fix group projects styles

Makes new project button visible when no projects are available.
Fixes #13193 

# BEFORE
![Screen_Shot_2016-02-04_at_1.08.27_PM](/uploads/36be9d5892506e7d1abcf4eb2a622e12/Screen_Shot_2016-02-04_at_1.08.27_PM.png)

# AFTER (w/projects)
![Screen_Shot_2016-02-04_at_1.07.48_PM](/uploads/fa257a1965017ff1274572dc66fccf90/Screen_Shot_2016-02-04_at_1.07.48_PM.png)

# AFTER (no projects)
![Screen_Shot_2016-02-04_at_1.07.28_PM](/uploads/326f6fdac24b56e8408efd0d11dc2805/Screen_Shot_2016-02-04_at_1.07.28_PM.png)

cc @creamzy @skyruler 

See merge request !2714

Fixes #8092

Revert "Remove newrelic gem. Closes #12860"

This reverts commit 53176717.

Conflicts:
	Gemfile.lock

See merge request !2943

Load award emoji picker with ajax request

Fixes #13301.

See merge request !2888

- Separates the User page bio from the username and account creation
date.
- Separates the pseudo-selector adding a Middle Dot out from the
`profile-link-holder` class and into a `middle-dot-divider` class.

Resolves #13406.

See merge request !2827.

Makes new project button visible when no projects are available.
Fixes #13193

Update sentry-raven to 0.15.6

Fixes a few bugs, most notably (for our purposes): https://github.com/getsentry/raven-ruby/pull/450

See merge request !2947

Adds "e" shortcut to issuable pages which redirects to the Edit page

Closes #13510

See merge request !2945

Show Crowd login even when sign-in is disabled

Fixes #13176.

See merge request !2749

Does not raise an error when Todo  is already marked as done

Closes #13681 

See merge request !2926

Set of UI fixes

* Improve wiki pages
* Improve profile pages

cc @skyruler 

See merge request !2758

This reverts commit 53176717.

Conflicts:
	Gemfile.lock

Restrict permissions on public/uploads

Based on https://gitlab.com/gitlab-org/omnibus-gitlab/merge_requests/631

See merge request !2764

Closes #12790

Fixes issue with file view rows not clickable on project main view

Fixed an issue where it would only load the first 25 commit data on project main view.

Stopped the file view sending 1 too many requests.

Fixes #3916

See merge request !2933

fix some links



See merge request !2812

Users don't get instructions to push to other users empty projects

Fixes #12518

![Screen_Shot_2016-02-22_at_17.38.18](/uploads/42a3c32af1326f15a7b40fd7153a89fb/Screen_Shot_2016-02-22_at_17.38.18.png)

See merge request !2923