[easytag] (7 commits) Non-fast-forward update to branch wip/core-refactoring

[David King <davidk src gnome org>]

The branch 'wip/core-refactoring' 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:

  9bb8b2e... Update version to 2.5.1 on master
  f0843da... Mark up a string for translation
  1a8d5dd... Simplify FLAC tag field setting
  ffb6ab8... Remove et_ogg_write_tag()
  37f395b... Make the Vorbis comment field names into defines
  bcbe20f... Avoid locale-sensitive field name reading for FLAC

Commits added to the branch:

  30e2c67... Only install the metainfo file if requested (*)
  50a1550... Update version to 2.5.1 on master
  94547c1... Mark up a string for translation
  60662c6... Simplify FLAC tag field setting
  13c2e01... Remove et_ogg_write_tag()
  57fe72b... Make the Vorbis comment field names into defines
  dcf756e... Avoid locale-sensitive field name reading for FLAC

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