Artwork support

Features

• The plugin now writes the cover of the current track, and broadcasts its path.

Fixes

• Fix parameter direction in introspection XML
• Add annotations to introspection XML to decribe behavior more accuratly
• The plugin now does not restart the song anymore when it recieves a Play call while already playing
• Fix the PropertiesChanged signals.
• fix set/get Shuffle property

Fixes wrong null checks

v1.3

Wrong null checks removed

Fixes and removal of debug messages

• Removes the debug messages of the plugin
• Fixes a crash when setting Properties on the Player interface

Datatype fixes

This Release contains mostly Datatype fixes. Especially for the Metadata Map.

First Version

Everything that is required by the MPRISv2 is implemented.