* upstream/master:
  release 4.0.0
  Move .file_contents to RepositoryFiles module, matching GitlabHQ API doc.  Also update route so it actually works with APIv4.
  Fix .get_file for new APIv4 route
  Update gitignore
  Add ability to get all issues a merge_request will close (NARKOZ#271)
  Update CHANGELOG, add some missing entries.
  Block/unblock user now uses POST instead of PUT.  Fixes NARKOZ#262.
  Adds ability to create commits (NARKOZ#264)
  Rename "git hook" to "push rule".  Closes NARKOZ#233.
  Change project fork endpoint for v4 API. Closes NARKOZ#236.
  Add v4-endpoint to fetch all merge_requests for a milestone (NARKOZ#265)
  Fixes NARKOZ#222, using deploy_keys endpoint (NARKOZ#261)
  (Un)subscribe to issues and merge_requests (NARKOZ#260)
  Update merge_request endpoints to new merge_requests endpoints (NARKOZ#256)
  Fix failing test that was called with a pre-urlencoded string.
  Allow issues to use NAMESPACE/REPO identifier (NARKOZ#255)
  Feature/230 note that project id can also be a string (NARKOZ#253)