ready callback is now after the root playlistcontainer has loaded again.
Bump to 0.5.1
Can attach a metadata_updated callback from Javascript.
Added a wrapper for the metadata_updated callback that allows to execute a callback on objects as soon as they are loaded.
Bugfix for metadataupdater: If a callback changes the queue the update will be lost at the end of metadataUpdated
Small test to show how to work with the metadata updater.
Fixed #41 where node-spotify would crash if a track is accessible but not loaded.
Added a changelog.