[gtksourceview] (19 commits) Non-fast-forward update to branch wip/loader-saver

[Sébastien Wilmet <swilmet src gnome org>]

The branch 'wip/loader-saver' 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:

  62b3cec... File loading and saving
  afe5f3f... Move some enum types to gtksourcetypes.h
  d72bab2... build: rename helper library private -> core
  d751b87... encoding: comment unused functions
  a4481e0... GtkSourceEncoding documentation
  f8c0e4d... Some code improvements
  25cd837... GtkSourceFile, the come back
  c0114f9... Move mount_operation_factory to GtkSourceFile
  69c1912... Add missing GI annotation
  b662a7d... FileSaver: add setting: ignore invalid chars
  e890e64... File saving: check if the file is externally modified
  fa4e016... FileSaver: flags instead of boolean properties
  551039a... FileSaver: use IGNORE_MODIFICATION_TIME flag
  ae68087... Make GtkSourceMountOperationFactory introspection-friendly
  acdd520... Make load_async() and save_async() introspection-friendly
  2d8ad8e... Make gtk_source_file_set_location() public
  2269c86... Make BufferOutputStream more robust after dispose
  e7cf904... FileLoader: update GtkSourceFile location directly

Commits added to the branch:

  4e60630... CompletionContext: keep a ref to the mark (*)
  33e24ca... File loading and saving
  db542ff... Move some enum types to gtksourcetypes.h
  9abd84a... build: rename helper library private -> core
  0d90bf4... encoding: comment unused functions
  b7c2249... GtkSourceEncoding documentation
  bf5c806... Some code improvements
  02d73f1... GtkSourceFile, the come back
  c4848b0... Move mount_operation_factory to GtkSourceFile
  ad9be2a... Add missing GI annotation
  6482174... FileSaver: add setting: ignore invalid chars
  28d315f... File saving: check if the file is externally modified
  abef1e6... FileSaver: flags instead of boolean properties
  6f77659... FileSaver: use IGNORE_MODIFICATION_TIME flag
  323e37d... Make GtkSourceMountOperationFactory introspection-friendly
  26eef69... Make load_async() and save_async() introspection-friendly
  6993092... Make gtk_source_file_set_location() public
  a33d1dd... Make BufferOutputStream more robust after dispose
  3beeba8... FileLoader: update GtkSourceFile location directly

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