Validate README format

Take the first previewable README file as project's README, otherwise if
none file is available, or we can't preview any of them, we assume that
project doesn't have a README file.

Fixes #3978

Update version check images to use SVG

See merge request !2244

Better support for referencing and closing issues in asana_service.rb (by @mikew1)



See merge request !2302

Add graphs of commits ahead/behind default branch (by @brunsa2)

Replaces https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/1716

See merge request !2301

Show 'New Merge Request' buttons on canonical repo. (by @joshfng)

Replaces https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/2189 to run tests on our runners.

See merge request !2300

Abuse Report refactors

- Redirect back to user profile after report
- "Tell, Don't Ask" for sending report notifications

See merge request !2293

Merge pull request GH-9938 from huacnlee/hotfix/note_mail_with_notification

Hotfix note mail with notification

See merge request !2288

Support a single directory traversal in RelativeLinkFilter

Prior, if we were viewing a blob at
`https://example.com/namespace/project/blob/master/doc/some-file.md` and
it contained a relative link such as `[README](../README.md)`, the
resulting link when viewing the blob would be:
`https://example.com/namespace/project/blob/README.md` which omits the
`master` ref, resulting in a 404.

Fixes https://gitlab.com/gitlab-org/release-tools/issues/3

See merge request !2247

Take the first previewable README file as project’s README, otherwise
if none file is available, or we can’t preview any of them, we assume
that project doesn’t have a README file.

Help "SSH" fixes

A user was confused why ssh login did not work because he had used a nonstandard name during the key generation step. Maybe this will make it clearer.

See merge request !2296

Users must not change the default filename or they will have to create a
suitable .ssh/config which is out-of-scope here.

The keytype field is actually `ssh-dss` for DSA keys and they will not
be stored as `id_rsa.pub`.

Note that newer version of ssh actually also support
`ecdsa-sha2-nistp256` and others so it is also misleading to assume the
field always starts with `ssh-`.

markdown fixes

old
![Screenshot_2016-01-05_10.49.46](/uploads/731f0e83ceefa74650ea27f8dca67b35/Screenshot_2016-01-05_10.49.46.png)

new
![Screenshot_2016-01-05_10.51.51](/uploads/85a82b2a589f9a4ad3dd47c6de3b89d7/Screenshot_2016-01-05_10.51.51.png)


See merge request !2295

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

Adds settings menu to the top for editting and leaving projects

@creamzy @skyruler @dzaporozhets 
Menu contents depends on user's rights.

Fixes #4221


![Screen_Shot_2015-12-23_at_10.02.47_PM](/uploads/daeaef937bf9d9f4db7ccb674e344ac1/Screen_Shot_2015-12-23_at_10.02.47_PM.png)
![Screen_Shot_2015-12-23_at_10.02.41_PM](/uploads/58eb4eea7d640f01d7f05c2a408a2c04/Screen_Shot_2015-12-23_at_10.02.41_PM.png)
![Screen_Shot_2015-12-23_at_10.02.55_PM](/uploads/4b2ae027a13efcbad3eb81b04f134c4f/Screen_Shot_2015-12-23_at_10.02.55_PM.png)
![Screen_Shot_2015-12-23_at_10.04.47_PM](/uploads/bd5d9d8ddd72d16d74c32c6c1f569776/Screen_Shot_2015-12-23_at_10.04.47_PM.png)


See merge request !2195

Tuning of metrics data to store

This removes data we don't really need, as well as making sure we don't overload any cache stores or databases.

See merge request !2265

Use the logo as a loading indicator

![logo-sweep](/uploads/ff048fd2e56a6dcae8801f998b484623/logo-sweep.gif)

See merge request !2277

Don't notify users twice if they are both project watchers and subscribers

Closes #4708

See merge request !2290

Remove jquery.blockUI.js plugin

It was only used to block the issue (but not merge request) list when
the sort was changed.

See merge request !2287

Redesign the AbuseReports index

- User profile links go to the admin area
- Shows when the reported user joined
- Show relative timestamp for when the report was created
- Parse message with restricted Markdown pipeline to autolink URLs

Related to https://gitlab.com/gitlab-org/gitlab-ce/issues/4667

See merge request !2292

Tell, Don't Ask.

Now the reporter will see the fruits of their labor, namely, the red
icon!

- Shows when the reported user joined
- Show relative timestamp for when the report was created
- Parse message with restricted Markdown pipeline to autolink URLs

Closes #4708

Her left, not ours!

Show all builds by default in the builds page

Fixes #4240 

See merge request !2243

[ci skip]

Hotfix note mail with notification

Add DEBUG_BANZAI_CACHE env var to debug Banzai cache issue.

See https://gitlab.com/gitlab-org/gitlab-ce/issues/4130#note_3012511

See merge request !2283