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

[Abhinav Jangda <abhijangda src gnome org>]

The branch 'wip/musicbrainz-support-merge' 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:

  6f96a2a... Added Country and Date columns for Album
  518da2c... libdiscid is optional
  9674ffe... Added more ifdef to fix "missing action MBSearch" warning
  5d7de5c... Changed Retrieving Track message to include medium also
  7377370... Use NULL pointer check instead of GTK_IS_TYPE
  96a9002... Toolbar buttons are disabled at the starting
  86c8f9c... Use et_music_brainz_dialog_clear
  45af336... A few comments
  44d7453... Use g_return_if_fail for checking GtkTreeModelFitler

Commits added to the branch:

  4fd7ea5... Added Country and Date columns for Album
  d85da01... libdiscid is optional
  0ff4108... Added more ifdef to fix "missing action MBSearch" warning
  796713e... Changed Retrieving Track message to include medium also
  b8a05a8... Use NULL pointer check instead of GTK_IS_TYPE
  4510783... Toolbar buttons are disabled at the starting
  0b903ee... Use et_music_brainz_dialog_clear
  e7c44f0... A few comments
  e831ea3... Use g_return_if_fail for checking GtkTreeModelFitler