Now that Repository#raw_repository no longer sets the autocrlf option it
will also no longer raise any NoRepository errors since it doesn't
access Rugged any more. This also means that Repository#exists? can't
simply return the raw repository as this is no indication of whether or
not the repository actually exists (besides returning a non boolean is
weird in the first place).

To solve this problem Repository#exists? now properly checks if the
repository exists and returns true/false instead of a
Gitlab::Git::Repository or nil object.

Setting the "autocrlf" Git option is an overkill since it's rarely
actually needed. More importantly, it has quite the impact on
performance (see gitlab-org/gitlab-ce#13457 for more information).

By setting "autocrlf" when creating or updating files we guarantee the
option is always set properly when we actually need it _without_
introducing overhead for requests that have nothing to do with this
option.

Fixes gitlab-org/gitlab-ce#13457

Re-add section about NGINX config and init script updates in 8.4->8.5 update doc

These sections were removed by !2766 but:
- even if the NGINX config wasn't modified, it might
  be in future updates so it's better to always have
  it instead of having to remember to add it depending
  on the changes
- the init script update section must be there since
  it's a safe command line that should be run on every update

This fixes https://github.com/gitlabhq/gitlabhq/issues/10031.

/cc @rspeicher @yorickpeterse 

See merge request !2815

Reduce code complexity on GitPushService#execute

Code complexity for gitlab-ce after this has been refactored:
```
  27.3: GitPushService#execute
```
This still needs to be merged into `gitlab-ee` presumably with conflicts... Perhaps we should create another issue for doing that?

I left the code sort of similar to what it was... If I could, I would have refactored most of the code into separate classes, etc. as it breaks probably all SOLID principles.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/13327


See merge request !2784

Bump unicorn to `~> 4.9.0`

Closes #2820 

See merge request !2843

Reopened MRs should also be considered as open.

Fixes #13539 

See merge request !2866

Remove remaining sqlite method call

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/13535

See merge request !2862

Add ability to see and sort on vote count from Issues and MR lists

Fixes #3763

* Sort options

![Sort Options](/uploads/df6543d574d4df8bf7e4496a876e2930/sort.png)

* Most popular

![Most popular](/uploads/bb92cc2fbef7b6b806dcdf8c52778fdd/most-popular.png)

* Least popular

![Least popular](/uploads/7988ed451922c81dc228419b5edbd7cd/least-popular.png)

See merge request !2781

Refactor 'git archive' hand-off to gitlab-workhorse

We have a nicer way now to hand off HTTP responses to gitlab-workhorse.

Companion MR: https://gitlab.com/gitlab-org/gitlab-workhorse/merge_requests/36

See merge request !2675

Correct icon for milestones.



See merge request !2856

Sort line notes used in parallel diff by created_at


Fixes #13464.

See merge request !2858

Redirect /import to project page if no importing at all and repo exists


Fixes gitlab-org/gitlab-ce#13367.

See merge request !2857

Fixes #13464.

Handle nil commits in Gitlab::PushDataBuilder.build

Closes #13469

See merge request !2825

Expire caches after forking/importing a repository

cc @dblessing @DouweM 

Related issue: gitlab-org/gitlab-ce#13505

See merge request !2838

Fixes for showing images

- Render scrubbed SVG's inline, not via /raw/
- Use /raw/ requests on image diffs

Both of these are needed because of no longer eager loading blobs.

This a follow-up to https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/2830

Also see https://gitlab.com/gitlab-org/gitlab-ce/issues/13350

See merge request !2837

Fixes #13367.

Fix a bug preventing from doing subsequent edits in any Issuable sidebar

Fixes #13517. Fixes #12572.

### Issue

![impossible-subsequent-issue-edits-in-sidebar](/uploads/bd45c0effb46848641932d9cd38d3fe2/impossible-subsequent-issue-edits-in-sidebar.gif)

---

### Merge request

![impossible-subsequent-mr-edits-in-sidebar](/uploads/b4e1e3e93df4ac0a3d962df8b6139de9/impossible-subsequent-mr-edits-in-sidebar.gif)

/cc @jschatz1 @sytses 

See merge request !2848

Fix 500 error when comparing by tags

_Originally opened at !2787 by @klowner._

- - -

Fixes #13171.
Fixes #13370.

See merge request !2849

Fix double scrollbar issues

Sidebar double scrollbar issue fix.

![Screen_Shot_2016-02-16_at_9.22.49_PM](/uploads/cb950eda08ed5d3b4a6c6979c977e029/Screen_Shot_2016-02-16_at_9.22.49_PM.png)

See merge request !2851

Prevents floated button group on issues view

Issue #13359 

![screenshot](/uploads/962ac4f3f1f3d6ef87f7152c09090801/screenshot.jpg)

See merge request !2826

This ensures that _all_ caches (including any caches normally only
flushed under certain conditions) are flushed whenever a project is
removed. Because cache keys are based on project namespaces (excluding
IDs) not doing so could result in a newly created project re-using old
caches (if the project was re-created using the same name).

This ensures the caches for Repository#empty? and
Repository#has_visible_content? are flushed after a repository has been
imported or forked.

Fixes gitlab-org/gitlab-ce#13505

Updated the allocations Gem to 1.0.4

Sometimes the output of Allocations.to_hash may contain garbage. See
https://gitlab.com/gitlab-org/allocations/commit/15d3a39f51392013dcf5f88dd21fab31201350ce
for more information.

See merge request !2816

[Award Emoji]: sporadic spec fix



See merge request !2833