[gtksourceview] (6 commits) Non-fast-forward update to branch wip/metadata

[Sébastien Wilmet <swilmet src gnome org>]

The branch 'wip/metadata' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  5c67b3f... File: add get/set_metadata()
  2944179... FileLoader: load metadata
  8bf72c0... FileSaver: save metadata
  9c3443d... FileSaver: add flag to not save metadata
  6524e98... FileSaver: add save_metadata(), sync and async versions

Commits added to the branch:

  379cac0... file: check GCancellable params (*)
  9358f82... File: add get/set_metadata()
  f4f5240... FileLoader: load metadata
  c34f2fd... FileSaver: save metadata
  2545c34... FileSaver: add flag to not save metadata
  7c9d28c... FileSaver: add save_metadata(), sync and async versions

(*) This commit already existed in another branch; no separate mail sent