Fully embrace Ruby 1.9 hash syntax

app/contexts/commit_load.rb

app/contexts/issues_bulk_update_context.rb

app/controllers/admin/projects_controller.rb

app/controllers/admin/users_controller.rb

app/controllers/application_controller.rb

app/controllers/commits_controller.rb

app/controllers/dashboard_controller.rb

app/controllers/deploy_keys_controller.rb

app/controllers/hooks_controller.rb

app/controllers/issues_controller.rb

app/controllers/keys_controller.rb

app/controllers/merge_requests_controller.rb

app/controllers/milestones_controller.rb

app/controllers/notes_controller.rb

app/controllers/profile_controller.rb

app/controllers/projects_controller.rb

app/controllers/protected_branches_controller.rb

app/controllers/refs_controller.rb

app/controllers/search_controller.rb

app/controllers/snippets_controller.rb