[libmediaart] Created tag 0.7.0

[Martyn James Russell <mr src gnome org>]

The signed tag '0.7.0' was created.

Tagger: Martyn Russell <martyn lanedo com>
Date: Mon Sep 22 15:31:43 2014 +0100

    Release 0.7.0

Changes since the last tag '0.6.0':

Arnel A. Borja (1):
      cache: Allow null values in artist, title and prefix

Martyn Russell (3):
      tests: Don't clear existing caches with unit tests, set XDG_CACHE_HOME
      extract: Fixed gtkdoc warning for return value of media_art_error_quark()
      Release 0.7.0