NEW in 0.3.0
============

  * New major version
  * Updated i18n translations
  * "last-played-time" now is a GDateTime key, instead of string
  * Support builtin plugins
  * Get rid of XML plugin definitions
  * New way of defining plugins (GRL_PLUGIN_DEFINE)
  * Plugins must be explicitly activated after loading them
  * Merge GrlMedia{Audio,Video,Image,Box} in GrlMedia