Allow serving raw files with the correct content-type header (mime type)
Implement a feature which allows serving the raw files with the correct file headers as a setting (instead of doing it the hacky way, by editing raw_controller.rb as suggested here http://stackoverflow.com/questions/29982037/gitlab-rails-raw-file-mime-type-for-svg-files-is-text-plain-can-it-be-co ).
For my needs it would suffice if it was a list with settings on a file-suffix basis, but there could be cleaner ways to implement this of course (e.g. just use the mime detection program of the Gitlab server which can be enabled or disabled in the settings).