Reduce image size.

Checking the site with the PageSpeed extension, one of the reports was
in reducing image size.  This reduced the number of bytes by 67%.

It was done with optipng -o7 -fix *.png in the app/assets/images dir.

References:
  optipng: http://optipng.sourceforge.net/
  PageSpeed extension: https://developers.google.com/speed/docs/insights/using_chrome
Merge branch 'master' into logo-white-compress

Conflicts:
	app/assets/images/logo-black.png
	app/assets/images/logo-white.png
Another optipng run over png's.

Ran optipng -o7 -fix over all png files. This should make pages load a
tiny bit faster (you can test this with the pagespeed tool on firefox or
chrome).

It might be an idea to add *lossless* image compression optimization
runs to the release process.
Also optimise gifs with gifsicle.

These are the same gif files just after running
gifsicle -b --optimize **/*.gif
Removed hash from "<user> #pushed to branch..." Hipchat notification
Correct section number for 'Check application status'
Add files to path blacklist.
Remove empty ErrorsController
Fix broken test in spec/models/project_spec.rb

A test was broken if running on a non-standard port.
Made checking for (non-)standard port more robust.
Changed gitlab_on_non_standard_port to gitlab_on_standard_port (less negative).
Remove snippet expiration date from UI
Mobile UI improvements for dashboard/nav

Style navbar toggle button

Style navbar toggle manually instead of with button classes

Style navbar

Modify color

Turn off all tooltips for touch devices

Style main nav

Fix scrolling navbar collapse

Style tweaks

Minor tweaks

Style no ssh key message
improve upgrader "latest version" message
Merge branch 'master' of /mnt/ebs/repositories/sriharsha.vardhan/gitlab-ce
Merge branch 'hipchat-remove-hash' of /mnt/ebs/repositories/Tenzer/gitlab-ce
Merge pull request #6163 from Corobi/master

improve upgrader "latest version" message
Merge pull request #5476 from lyda/logo-white-compress

Reduce image size.
Merge pull request #6159 from dblessing/fix/mobile_ui_dashboard

Mobile UI improvements
Merge pull request #6158 from Razer6/remove_snippet_expiaration_date

Remove snippet expiration date from UI
Merge branch 'master' of gitlab.com:gitlab-org/gitlab-ce
Merge branch 'fix/test' of /mnt/ebs/repositories/jhworth.developer/gitlab-ce
Merge branch 'fix/routing' of /mnt/ebs/repositories/jhworth.developer/gitlab-ce