Merge branch 'feature/merge_request_serialize'

app/controllers/blame_controller.rb

app/controllers/blob_controller.rb

app/controllers/raw_controller.rb

app/controllers/refs_controller.rb

app/helpers/tree_helper.rb

app/models/merge_request.rb

app/models/tree.rb

app/services/git_push_service.rb

app/views/blame/show.html.haml

app/views/blob/_actions.html.haml

app/views/blob/_blob.html.haml

app/views/blob/_download.html.haml

app/views/blob/_image.html.haml

app/views/blob/_text.html.haml

app/views/blob/show.html.haml

app/views/blob/show.js.haml

app/views/commits/_diffs.html.haml

app/views/graph/show.json.erb

app/views/tree/_blob.html.haml

app/views/tree/_blob_item.html.haml