Merge branch 'toggle_diff_comments' of https://github.com/jacob-carlborg/gitlabhq into jacob-carlborg-toggle_diff_comments

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

Conflicts:
	app/assets/stylesheets/sections/commits.scss
	app/assets/stylesheets/sections/notes.scss
	app/views/projects/commits/_diffs.html.haml
	features/steps/project/merge_requests.rb