Merge branch 'master' into mentioned_inside_mr

app/controllers/projects/base_tree_controller.rb

app/controllers/projects/blame_controller.rb

app/controllers/projects/blob_controller.rb

app/controllers/projects/branches_controller.rb

app/controllers/projects/commit_controller.rb

app/controllers/projects/commits_controller.rb

app/controllers/projects/compare_controller.rb

app/controllers/projects/graphs_controller.rb

app/controllers/projects/network_controller.rb

app/controllers/projects/raw_controller.rb

app/controllers/projects/refs_controller.rb

app/controllers/projects/repositories_controller.rb

app/controllers/projects/tags_controller.rb

app/controllers/projects_controller.rb

app/models/event.rb

app/models/project_services/flowdock_service.rb

app/models/project_services/gemnasium_service.rb

app/models/project_services/gitlab_ci_service.rb

app/services/git_push_service.rb

app/services/system_hooks_service.rb