Create uploads dir otherwise backup fails. Fix #4304
contributing guideline updates

* updated close policy
* added line on courtesy & respect to volunteers
* request that issue information be placed in first issue post
Fix missing assigned_to renaming in 2e839ce

fixes #4360.
Rename unspecified to make it clearer and in line with scrum terminology.
Add animated screenshots.
Notes about what PR's we would like to see.
Merge pull request #4407 from jackbot/master

Database seeding failing
Show participants on issues, including mentions, and notify email to all participants
Merge pull request #3898 from jacargentina/notifymentioned

Notify email to mentioned users; show participants ala github on issuables
we should not use `console.log` in production code...
Merge pull request #4410 from senny/dont_console_log_in_code

we should not use `console.log` in production code...
Detail gem update policy.
fix bad constant reference in `project_routing_spec.rb`.
Merge branch 'animated-gif' of /home/git/repositories/gitlab/gitlabhq
Merge branch 'gem-update-policy' of /home/git/repositories/gitlab/gitlabhq
Merge branch 'contributing-pull-requests' of /home/git/repositories/gitlab/gitlabhq
Don't show 'Filter by labels' text if there are no labels
Don't show project search form if there are no projects
Merge remote-tracking branch 'upstream/master'
whitespaces in gitlab.yml.example
Merge pull request #4361 from kenips/master

Add missing assigned_to renaming to merge_requests_load_context