Added info about common UI problems if IE Compatibility View mode is enabled.

/cc @sytses @Haydn

See merge request !939

Fix Transfer project input width.

Hi,

On the **Transfer project** box of project settings page, the **Namespace** input  is wider than other inputs.

This PR set the `col-sm-*` css-class of the container to the same as other inputs.

## Screenshots
Before

![before](https://gitlab.com/Metalaka/gitlab-ce/uploads/9b3e4ad07d1a199d3e1ee7e3ec1e5014/before.jpg)

After

![after](https://gitlab.com/Metalaka/gitlab-ce/uploads/8a4e87fa73a028a9ac814bdbbc6dcab3/after.jpg)

See merge request !940

Change "Irc Uri" -> "IRC URI"

See merge request !937

Use native Postgres database cleaning during backup restore

We were using hacks to drop tables etc during a Postgres backup
restore. With this change, we let pg_dump insert the DROP TABLE
statements it needs at the start of the SQL dump.

See merge request !1891

New doc about creating groups

I added a new document about creating groups in GitLab.

I also fixed comment in previous MR https://dev.gitlab.org/gitlab/gitlabhq/merge_requests/1885


See merge request !1886

Conflicts:
	doc/install/requirements.md

We were using hacks to drop tables etc during a Postgres backup
restore. With this change, we let pg_dump insert the DROP TABLE
statements it needs at the start of the SQL dump.

use relative link to SSH setup page

Compress database backup

Restore handles both cases: uncompressed and compressed backup. As an improvement `IO.popen` can be used.

/cc @jacobvosmaer

See merge request !873

API to set application settings for admin
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !934

Detail too many warning to explain that merge will still work.



See merge request !1889

Return 40x error codes if branch could not be deleted in UI

### What does this MR do?

This MR makes `BranchesController` return the proper status code in case of a failure to delete a branch.

### Why was this MR needed?

Deleting a branch would always return status 200, even if the branch could not be found or deleted for some reason. This was confusing because while trying to debug an issue with encoded slashes, it looked like the deletion was successful when it had failed.

### What are the relevant issue numbers?

This issue was uncovered in #1804

See merge request !823

Add ref switching support for graphs

It is now possible to view contributor and commit statistics for
refs beyond the default branch. While the Git ref already was part of
the path it has not been used before.

Additionally, the code in RefsController#switch has been slighliy
refactored since it would have become confusing with additional if-else
branches added.

See merge request !932

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

It is now possible to view contributor and commit statistics for
refs beyond the default branch.

Additionally, conditions in RefsController#switch have been refactored
in order that a `case` block is used now.

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

Use teaspoon instead of jasmine:ci

Disable sticky diffs

Revert feature introduced in https://github.com/gitlabhq/gitlabhq/pull/8760

Why?

* It has unfixed bug for long time which is really annoying - https://github.com/gitlabhq/gitlabhq/pull/8760
* I was not able to properly fix it
* It affected performance in bad way

See merge request !935

Audit log for user authentication

https://dev.gitlab.org/gitlab/gitlabhq/issues/2318

See merge request !931

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