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

[David King <davidk src gnome org>]

The branch 'wip/dsf-support' 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:

  0db1a47... Read DSF header information
  db31966... Read ID3v2 tags from DSF files
  14de532... Write ID3v2.4 tags to DSF files
  27af059... Write ID3v2.3 tags to DSF files
  3e3e64c... Move private ID3 functions into a separate header
  4c3dfc1... Strip additional ID3 date fields while saving

Commits added to the branch:

  6456cdf... Move file selection dialogs to application window (*)
  3d5ccb5... Remove unused et_get_file_size() (*)
  51ff491... Read DSF header information
  c6140d6... Read ID3v2 tags from DSF files
  3b2d8de... Write ID3v2.4 tags to DSF files
  3c6106f... Write ID3v2.3 tags to DSF files
  903801a... Move private ID3 functions into a separate header
  995de83... Strip additional ID3 date fields while saving
  f6d3a2a... WIP Add tests for DSF format support

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