Get "Merge when build succeeds" to work when commits were pushed to MR target branch while builds were running

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

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

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

Prevent duplicate "username has already been taken" validation message

Closes #201 - two-year-old bug, woo! 💥 🎉

See merge request !2279

Revert "Merge branch 'rs-remove-jquery-blockui' into 'master'"

This reverts commit bc12750f, reversing
changes made to 8a04b84e.

See merge request !2285

Added system hooks messages for renaming and transferring a project

This is work in progress but I wanted to get some feedback on it in case there is something I've missed or a better way to do it.

As the title says when a project is renamed or transferred to another group a system hook message is generated.

Currently adds a couple of extra properties to the standard project system hooks messages.

old_path_with_namespace - The old path of the project so we can see what has been renamed / transferred
changed_at - The time that change took place

My main concern is if there is a better way of doing this than passing the extra_data variable into the system hook.  Would it be better to extend the project model with these 2 items as transient properties as I doubt they would need to be saved to the database?  The other 

I've also seen, but can't find, someone talking about the emails sent when a project is renamed or transferred doesn't reference the original project path so if you have similarly named projects then you might not know what has been moved.  I think the extra_data (or however it is best to implement this) would allow the extra information to be sent in emails.

Closes [System hooks for project transfer and repository rename](http://feedback.gitlab.com/forums/176466-general/suggestions/6006233-system-hooks-for-project-transfer-and-repository-r)


See merge request !611

Remove public field from namespace

https://gitlab.com/gitlab-org/gitlab-ce/issues/3580

See merge request !2222

This reverts commit bc12750f, reversing
changes made to 8a04b84e.