[easytag] (6 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:

  e059387... Add a case-insensitive UTF-8 string comparison
  b222ed0... Add simple tests for et_normalized_strcasecmp0()
  40104b1... Enable case-sensitive sorting of artist/album list
  91c1045... Handle UTF-8 strings when sorting the file list
  e4bc1e0... Factor out common string sorting code

Commits added to the branch:

  b4ee352... Add a case-insensitive UTF-8 string comparison
  1f38d57... Add simple tests for et_normalized_strcasecmp0()
  a5bb0b6... Enable case-sensitive sorting of artist/album list
  6334588... Handle UTF-8 strings when sorting the file list
  9175ec9... Factor out common string sorting code
  76b1a62... Refactor Add_Row_To_Search_Result_List()