Merge branch 'master' of gitlab.com:gitlab-org/gitlab-ce

CHANGELOG

app/controllers/projects/branches_controller.rb

app/controllers/projects/graphs_controller.rb

app/controllers/projects/refs_controller.rb

app/views/projects/graphs/commits.html.haml

app/views/projects/graphs/show.html.haml

doc/api/README.md

doc/api/settings.md

doc/update/mysql_to_postgresql.md

lib/api/api.rb

lib/api/entities.rb

lib/api/settings.rb

lib/backup/database.rb

spec/controllers/branches_controller_spec.rb

spec/requests/api/settings_spec.rb