[easytag] (6 commits) Non-fast-forward update to branch wip/gtkbuilder

[David King <davidk src gnome org>]

The branch 'wip/gtkbuilder' 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:

  3e857a9... WIP Move scanner dialog to GtkBuilder

Commits added to the branch:

  cbc7f3a... Remove redundant NULL checks in CDDB dialog (*)
  b8c4707... Remove dead code in et_browser_label_set_text() (*)
  02b86bb... Use return value to speed up force saving files (*)
  b00b5ec... Move remaining upper-casing functions to scan.c (*)
  a21a43a... Add simple tests for style-sensitive case function (*)
  95a4f80... WIP Move scanner dialog to GtkBuilder

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