Changed # to ! on merge requests on activity view

Closes #9082

![Screen_Shot_2016-02-23_at_11.59.55](/uploads/87b859ae63282ae24025168404beb158/Screen_Shot_2016-02-23_at_11.59.55.png)

See merge request !2938

Batch size >1000 does not pay off

We did a small experiment to see how a full scan of the Redis keys on
gitlab.com speeds up as we increase the batch size. The values on the
right are time in seconds for a full scan (no delete operations).

```
count: 10);      284.500529021
count: 100);      86.21216934
count: 1_000);    60.931676195
count: 10_000);   60.96355610
count: 100_000);  62.378172541
```

It looks like 1,000 is a good number.

See merge request !2970

Explain why we mangle blob content types

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/9079

See merge request !2956

Closes #9082

Update Rails to 4.2.5.2

See https://groups.google.com/forum/#!msg/rubyonrails-security/ddY6HgqB2z4/we0RasMZIAAJ
and https://groups.google.com/forum/#!msg/rubyonrails-security/ly-IH-fxr_Q/WLoOhcMZIAAJ

See merge request !3019

Brings back missing "Gitlab" text on the logo

Closes #13851 

See merge request !2989

include contributions from forked projects on profile calendar

Shows contributions from forked projects in the calendar

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/3612

See merge request !2918

Add commit message to slack script

Ass suggested by @rdavila, this adds the current commit message as of HEAD to the slack script.

See merge request !3027

Add link to triggers doc in variables section

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/13901

See merge request !3025

[ci skip]

See https://groups.google.com/forum/#!msg/rubyonrails-security/ddY6HgqB2z4/we0RasMZIAAJ
and https://groups.google.com/forum/#!msg/rubyonrails-security/ly-IH-fxr_Q/WLoOhcMZIAAJ

Fixes padding loss after editing a diff comment

Also applies .timeago() to comment datetimes when diff page is entered directly.

Also fixes the vertical position of the comment count icon.

See merge request !3012

Revert "Merge branch 'issue_5854' into 'master'"

This reverts merge request !2992

cc @rdavila 

See merge request !3013

Fix for project paths ending in .wiki

This prevents `Git operation was rejected by pre-receive hook` when
an actual project ending with .wiki is thought to be a wiki by the
`Internal` API.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/13742

See merge request !2960

This reverts merge request !2992

Add commit message to JIRA's notification payload.

Closes #5854 

See merge request !2992

Improve implementation to check read access to forks and add pagination.

Fixes #13648 

The following optimizations where made:

- Pagination was added.
- Code to check for read permissions to forks was optimized, in the past we were doing too many queries for each project.


See merge request !2991

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

For !2927 

See merge request !3011

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

Removed NGProgress

In an effort to get the JS file size down, i've removed NGProgress and replaced with TurboLinks own loading indicator

Ref #13820 

![loading](/uploads/8b6ed8982e86e4b94803b56b8cd97737/loading.gif)

See merge request !3004

Changed too many changes buttons to white

Closes #13751 

![Screen_Shot_2016-02-29_at_09.18.41](/uploads/30f5d11d1a4e1785561597feeeb40f09/Screen_Shot_2016-02-29_at_09.18.41.png)

See merge request !3002

Small css cleanup for todos feature
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Cleanup for !2817

Fixes #13816 

cc @jschatz1 @skyruler @dbalexandre 

See merge request !2996

Sanitize `data` and `vbscript` links

Closes #13625 

Closes https://dev.gitlab.org/gitlab/gitlabhq/issues/2660

See merge request !2905