[easytag] (9 commits) Non-fast-forward update to branch wip/gio

[David King <davidk src gnome org>]

The branch 'wip/gio' 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:

  aeb9228... WIP Use GIO when reading and writing FLAC tags

Commits added to the branch:

  f8c48ea... Updated Polish translation (*)
  75c0257... Fix two memory leaks in CDDB dialog (*)
  df0919b... Refactor some CDDB dialog code to use GString (*)
  5ddceb7... Avoid a memory leak of the disc ID in error paths (*)
  35bc971... Added Norwegian bokmål translation from Åka Sikrom. (*)
  1305e10... Added nb (*)
  5dec634... Fix memory leak when constructing load file dialog (*)
  3fbdffa... Propagate double-click events on tree view headers (*)
  fdf0b93... WIP Use GIO when reading and writing FLAC tags

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