Fix 500 when editing CI services

Fixes #3090

See merge request !1663

Require jobs to be named

This properly presents error for .gitlab-ci.yml having empty job name.

See merge request !1662

Fix CSS class for runner status

Fixes #3117 

See merge request !1665

[ci skip]

Fixed suggestion in documentation resulting in linting error 'variables should be a map of key-valued strings'

Documentation now suggests a valid option with the intended result.

See #3147 

`"yes"`, opposed to `yes` is not casted to a boolean. `variables` only accepts key-valued strings.

Better solution would be to change the parsing of `variables` (allow boolean or check the actual value of the string).



See merge request !1660

Make sure MR refresh service correctly determines newly added commits.

Fixes #3140.

See merge request !1659

Fix build trace updating

Fixes #2910 

See merge request !1657

Don't show "Add README" link in an empty repository if user doesn't have access to push

Reporter users would see this before even though they didn't have access to push:

![image](/uploads/1dd328ab7e58cd00c5b696f079816e16/image.png)

It's not complete accurate to include the push command-line instructions, but users may still want the instructions to clone. After:

![image](/uploads/3d214e140916d2f174d0b5fec0ac472d/image.png)

Closes #3094

See merge request !1626

Closes #3094

Remove CI migration

See merge request !1656

Fix margin around Markdown Write/Preview tabs.

Reverts !1354 and uses another fix for #2585.

See merge request !1654

Animate the logo on hover

The logo is now rendered as pure SVG, rather than image referencing a
svg. The SVG has an id and the shapes of the logo have a shared class.
The shapes change their fill color on hover with a transition.

Identical to how it looks on about.gitlab.com

cc @skyruler 

See merge request !1557

Make tables full width.

## Before

![Screen_Shot_2015-10-19_at_11.17.32](/uploads/acea66825b41006a949b5cc31cc07699/Screen_Shot_2015-10-19_at_11.17.32.png)

## After

![Screen_Shot_2015-10-19_at_11.19.16](/uploads/ed61e5e6cafe06c5e2d75672f5585c93/Screen_Shot_2015-10-19_at_11.19.16.png)


See merge request !1642

Ensure MySQL CI limits DB migrations occur after the fields have been created

Closes https://github.com/gitlabhq/gitlabhq/issues/9753

See merge request !1653

Clear archive cache asynchronously



See merge request !1651

Closes https://github.com/gitlabhq/gitlabhq/issues/9753

Add missing migrations

See merge request !1652

The logo is now rendered as pure SVG, rather than image referencing a
svg. The SVG has an id and the shapes of the logo have a shared class.
The shapes change their fill color on hover with a transition.

Speed up searching for text references a bit



See merge request !1648

Correctly find last known blob for file deleted in MR.

Fixes #3092.

When building a new MR, `@merge_request.commits.last` would fail because this delegates to `merge_request_diff` which is still `nil` at that point. I fixed that, and changed some of the logic because showing deleted blob contents didn't previously work for the Compare page, and the UI would show the wrong commit sha for "View File @...".

See merge request !1647

Redirect to a default path if HTTP_REFERER is not set

Safari 9.0 does not yet honor the HTML5 `origin-when-cross-origin` mode,
and it's possible load balancers/proxies strip the HTTP_REFERER from
the request header. In these cases, default to some default path.

Closes #3122

Closes https://github.com/gitlabhq/gitlabhq/issues/9731

See merge request !1646

Update 8.0-to-8.1 update guide

- User needs to update gitlab-git-http-server
- User needs to update Nginx configuration

[ci skip]

See merge request !1625