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.
Detail gem update policy.
fix bad constant reference in `project_routing_spec.rb`.
Added delete button to snippet view
Added tooltip to snippet public/private icons
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
Merge pull request #4419 from jlgeering/master

whitespaces in gitlab.yml.example
Merge pull request #4412 from senny/fix_bad_constant_reference

fix bad constant reference in `project_routing_spec.rb`.
Merge pull request #4393 from dosire/scrum-improvements

Rename unspecified to make it clearer and in line with scrum terminology