Don't email omniauth created users
fix: grouping by date desc doesn't sort it too
fix build failure

(https://travis-ci.org/gitlabhq/gitlabhq/builds/3593153)
default gitlab.relative_url_root to ENV['RAILS_RELATIVE_URL_ROOT']
Fix image url for emoji.
Include Riyad Preukschas suggestions.
Distorted lines in `diff`

Distorted lines in `diff` when viewing files `windows-style-line-separator: \r\n`
Move graph module from lib or vendor directory to app directory.

Because not autoloading lib directory at development mode.
Fix the commits are not ordered commiter date.

It is fixed that the date label of network graph is broken.
update grape to 0.3.1 for ruby 2.0 support.

add grape-entity, that is split from grape 0.3.0.
remove usage of deprecated error_format, that is removed in grape 0.2.3.
Data converting migrations was wrong. Fixed
Fix project transfer error
Finding free space from the way near commit which is downward
API: fix commits pagination

closes #2300
Merge pull request #3095 from fdiary/update-grape-for-ruby2.0

update grape to 0.3.1 for ruby 2.0 support.
proper fix for #2300
Prevent duplicate merge events
Update README
Developers can merge MR if target branch is not protected
use system call to start sidekiq