Temporarily disable Markdown caching



See merge request !2120

Fix headers of milestone and snippet show pages

Fix layout, and move "Edit" button to very right just like issue/MR.

Before:

![Screen_Shot_2015-12-15_at_17.33.20](/uploads/dbbeb6868b80e21894159126a0feca6a/Screen_Shot_2015-12-15_at_17.33.20.png)

![Screen_Shot_2015-12-15_at_17.33.28](/uploads/53d10b42adc34e48b063889120e9a746/Screen_Shot_2015-12-15_at_17.33.28.png)

After:

![Screen_Shot_2015-12-15_at_17.34.25](/uploads/b0d0ea3f6a7b61d51b474419207f7a02/Screen_Shot_2015-12-15_at_17.34.25.png)

![Screen_Shot_2015-12-15_at_17.35.55](/uploads/65b922f5249655d3733740690577c9d7/Screen_Shot_2015-12-15_at_17.35.55.png)

cc @skyruler 

cc @rspeicher 8.3 please!

See merge request !2104

Only cache markdown when object has been saved and has a proper cache_key.

See merge request !2119

Fix 'Merge Immediately' button

Fixes #4125

See merge request !2117

Fix bad merge

/cc: @dzaporozhets 

See merge request !2116

Fix endpoint not setting needed @ci_commit

/cc @DouweM

See merge request !2112

Fix right margin of control list

Before:

![Screen_Shot_2015-12-16_at_16.29.39](/uploads/7a6aa79b6af0900d9257ce86ab822a22/Screen_Shot_2015-12-16_at_16.29.39.png)

After:

![Screen_Shot_2015-12-16_at_16.29.45](/uploads/d52fdc70ecd63fc61ae6ae87b3b7d1a5/Screen_Shot_2015-12-16_at_16.29.45.png)


See merge request !2114

Issuable sidebar tweaks

- Move cross-project reference down 
- ~~Fix "Notifications" label color~~ Reverted
- ~~Use regularly colored button for "Subscribe"/"Unsubscribe"~~ Reverted

Before:

![Screen_Shot_2015-12-15_at_17.38.08](/uploads/d4eeab44bb21fca2fe9ebe620ed9e060/Screen_Shot_2015-12-15_at_17.38.08.png)

After:

(Only the moved cross-project reference is still relevant, other changes have been reverted)

![Screen_Shot_2015-12-15_at_17.38.23](/uploads/b61aed3a0884c986785a5b09af8dbb25/Screen_Shot_2015-12-15_at_17.38.23.png)

cc @skyruler 

cc @rspeicher 8.3 please!

See merge request !2105

Fix double right border in MR discussion
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

# Before
![Screenshot_2015-12-16_15.44.00](/uploads/dd2c85e82fdb784e897cf1a695af1a1e/Screenshot_2015-12-16_15.44.00.png)

# After
![Screenshot_2015-12-16_15.43.36](/uploads/b50954e01bb3f45d2df6f43d34a1db60/Screenshot_2015-12-16_15.43.36.png)

cc @skyruler 

See merge request !2113

This reverts commit e4e1777a.

This reverts commit c1db8d15.

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

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

Revert "Make sure notify email always has author info."

This reverts commit 303f79f8.

See merge request !2103

Pass all requests from NGINX to gitlab-workhorse



See merge request !2073

Fix clipboard buttons on MR instructions and Commit#show



See merge request !2108

Add SVN to Git migration documentation

Document the process of migrating a SVN repository and pushing it to GitLab.

cc/ @axil

See merge request !2028

Fix time_ago_with_tooltip for activity feed

Closes #4002

See merge request !2074

Make profile navigation full wide
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

## Before


![Administrator___GitLab](/uploads/a43e8992264ed78afa732e7a911ef154/Administrator___GitLab.png)

## After

![Administrator___GitLab1](/uploads/9e67e8af071d4879045311abe15a7bba/Administrator___GitLab1.png)

See merge request !2076

[ci skip]

Move Markdown/reference logic from `Gitlab::Markdown` to `Banzai`

- Moves from `Gitlab::Markdown` to `Banzai`
- Moves filters and pipelines into their own namespace: `Banzai::Filter` and `Banzai::Pipeline`
- No more `autoload`!
- Split up `Gitlab::ReferenceExtractor` into `Banzai::ReferenceExtractor` and `Gitlab::ReferenceExtractor`
- Replace `something(load_lazy_references: true)` by `Gitlab::ReferenceExtractor.lazily { something }`

Goes from:

```ruby
def referenced_merge_requests
  references = [self, *notes].flat_map do |note|
    note.all_references(load_lazy_references: false).merge_requests
  end.uniq!

  Gitlab::Markdown::ReferenceFilter::LazyReference.load(references).uniq.sort_by(&:iid)
end
```

to

```ruby
def referenced_merge_requests
  Gitlab::ReferenceExtractor.lazily do
    [self, *notes].flat_map do |note|
      note.all_references.merge_requests
    end
  end.sort_by(&:iid)
end
```

See merge request !2027