Notification levels can now be set on the Project's main page

![Screen_Shot_2015-09-16_at_7.49.49_PM](https://gitlab.com/gitlab-org/gitlab-ce/uploads/0ac517bdfdc801f0e2115463c3ea9e10/Screen_Shot_2015-09-16_at_7.49.49_PM.png)

The notification settings for a project can now be set directly on the Project's page. The drop down list and the button label reflect the current level.

Saving is done via a remote form submission and if successful shows the user a flash message:

![Screen_Shot_2015-09-16_at_6.09.02_PM](https://gitlab.com/gitlab-org/gitlab-ce/uploads/8a6e1fde5177aa3976cadf59fdb8d375/Screen_Shot_2015-09-16_at_6.09.02_PM.png)

@DouweM can you please review my code. I gave my bestest effort to make in clean and readable.

@rspeicher hopefully we can include it with the 8.0 release, maybe?

/cc @darby 

See merge request !1322

Make Markdown area formatting consistent

Issue #2585 


See merge request !1354

Use GitlabCi::VERSION when checking migration



See merge request !1368

CI migration rake task for GitLab CE

- Uses backup format for final GitLab CI 8.0
- Highly optimized tags migration SQL queries


See merge request !1365

Fail ci builds without yml

Fix for https://gitlab.com/gitlab-org/gitlab-ce/issues/2551

See merge request !1349

Fix Markdown links not showing up in dashboard activity feed

Closes #2586

See merge request !1353

Fix reply by email for comments on a specific line in a diff/commit.

Fixes #2363.

See merge request !1364

Add Gmail actions button for GitLab doc.

Resolves #1517 by adding doc with some notes.

See merge request !1327

Fix 500 when showing project page and there's no CI project present

This fixes 500 when:
1. GitLabCiService is active
2. There's no project in ci_projects table


See merge request !1338

Closes #2586

Apply new design to pagination
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

cc @skyruler 

See merge request !1362

Style CI project/build list

* return `bs-callout` css class to fix few UI issues
* refactor build status helpers
* style CI project page (#2545)
* style build page by re-using existing UI components
* style CI commit page  by re-using existing UI components
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !1339

Removed format validation

**What does this MR do?**

Removals format validation for drone token

**Are there points in the code the reviewer needs to double check?**

Nothing

**Why was this MR needed?**

because drone migrated to JWT tokens and JWT token doesn't valid with current format ( i don't know how many symbols JWT can use for this )

See merge request !1359

Bump devise-two-factor to 2.0.0

Addresses internal https://dev.gitlab.org/gitlab/gitlabhq/issues/2605

See https://github.com/tinfoil/devise-two-factor/pull/43

See merge request !1363

fixes link to reply_by_email docs

Addresses internal https://dev.gitlab.org/gitlab/gitlabhq/issues/2605

See https://github.com/tinfoil/devise-two-factor/pull/43

Fix failing migration on mysql

We didn't specify that the db user needs the right to create temporary
tables before. That's why the migration will fail on most installations
that installed gitlab according to our documentation. This MR removes
the "TEMPORARY" from the migration and changes the documentation to
include the necessary rights for the future.

Fixes #2590

See merge request !1351

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

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

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

Fix IssuableContext javascript

We were calling `affix` before the events were bound so they never
triggered correctly.

Closes #2597

See merge request !1356

We were calling `affix` before the events were bound so they never
triggered correctly.

Closes #2597