Closes #152

Use gitlab-workhorse 0.5.4

Fixes routing errors for /api/v3/projects/

See merge request !2391

See merge request !2392

added make command to docs

The gitlab-workhose update docs are missing a make command

See merge request !2281

See merge request !2389

Where a vew is called from doesn't matter as much. We already know what
action they belong to and this is more than enough information. By
removing the file/line number from the list of tags we should also be
able to reduce the number of series stored in InfluxDB.

Fixes routing errors for /api/v3/projects/

This gives a very rough estimate of how much memory is allocated during
a transaction. This only works reliably when using a single-threaded
application server and a Ruby implementation with a GIL as otherwise
memory allocated by other threads might skew the statistics. Sadly
there's no way around this as Ruby doesn't provide a reliable way of
gathering accurate object sizes upon allocation on a per-thread basis.

Add user's last used IP addresses to admin page

This would help admins figure out from where spam is originating.

Screenshot:

![image](/uploads/984005a3a35b7004bd0a363081eb53ba/image.png)


See merge request !2381

Improve button styles

I noticed a couple of buttons don't match the newer styles.

## Issue edit note form

### Current (cancel button is big)

![Screen_Shot_2016-01-08_at_2.18.29_PM](/uploads/c7928e6644e886090f55cb61076c9e89/Screen_Shot_2016-01-08_at_2.18.29_PM.png)

### Now

![Screen_Shot_2016-01-08_at_2.18.22_PM](/uploads/d15c3c458a08ce5a59c367c7fb379c31/Screen_Shot_2016-01-08_at_2.18.22_PM.png)

## Merge request code discussion

### Current

![Screen_Shot_2016-01-08_at_2.21.37_PM](/uploads/b970ff3e5d9ef5e62f83bb56d5505f8d/Screen_Shot_2016-01-08_at_2.21.37_PM.png)

### Now (Also changed to `btn-save` class which changes to green. This matches everything else)

![Screen_Shot_2016-01-08_at_2.22.01_PM](/uploads/ed520de72177de92efe21d236bb04d24/Screen_Shot_2016-01-08_at_2.22.01_PM.png)

cc/ @jschatz1 @skyruler @creamzy 

See merge request !2350

See merge request !2385

I forgot to add these in the respective MRs.

[ci skip]

This would help admins figure out from where spam is originating.

Bump fog to 1.36.0

Updates AWS regions and fixes a number of bugs. Tested a GitLab AWS backup without any issues.

Closes #4231

See merge request !2373

adds hover titles to merge request and issue pages

Fixes #5899

See merge request !2375

changes bolded on active for dropdowns, sitewide.

Fixes #6056 <br/>
 **Note:** this change applies to all dropdowns. Currently all dropdowns using bootstrap's dropdown.js apply a bold and larger font for an active state.

See merge request !2377

Add title attribute to Emojis in award picker



See merge request !2378

Remove the `:coffee` and `:coffeescript` Haml filters

See https://git.io/vztMu and http://stackoverflow.com/a/17571242/223897

See merge request !2380

See https://git.io/vztMu and http://stackoverflow.com/a/17571242/223897

[ci skip] Fixed minor typo in docker documentation

This change is self-explanatory.

See merge request !2374

Call clearInterval for the currentTimer if one exists

Prevents a double-click from causing the logo to sweep forever after a
load completes.

See merge request !2379

Prevents a double-click from causing the logo to sweep forever after a
load completes.

[ci skip]

Allow subsequent validations in CI Linter

Closes #5851

See merge request !2368

Generate builds when creating tag using web interface

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/4296

See merge request !2366

Use gitlab-workhorse 0.5.3

See merge request !2367

Optimize LDAP and add a search timeout

Related to #4282 

This merge request arranges some things in `access.rb` to facilitate some optimizations in EE (to come later). It also adds a 10 second timeout to all LDAP searches so the entire worker is not blocked if some query doesn't return in a reasonable amount of time. This timeout is configurable per LDAP server.

See merge request !2267

See merge request !2370

Closes #4231