Fixed ~git beeing displayed as link to issues tagged with git in architecture.md
The architecture documentation explains `~git` from the picture below which is replaced by a [link to issues tagged with `git`](https://gitlab.com/gitlab-org/gitlab-ce/issues?label_name=git). I believe that this was unintended and should be fixed by using backticks.

See merge request !2814
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
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:

With this Merge Request:

See merge request !2827
Changed padding & background color for highlighted notes
Closes#12453

See merge request !2937
Fix group projects styles
Makes new project button visible when no projects are available.
Fixes#13193
# BEFORE

# AFTER (w/projects)

# AFTER (no projects)

cc @creamzy @skyruler
See merge request !2714
- 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.
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
Users don't get instructions to push to other users empty projects
Fixes#12518

See merge request !2923
Issues can be dragged & dropped into empty milestone lists
This is also possible with MRs. Also fixed an issue where MRs weren't sortable
Fixes#13668

See merge request !2935