Merge pull request #8 from NewboO/callbacks-update

Adding new callbacks
Bugfix: empty manialinks were sent to disconnected players
Adding new callbacks
Merge remote-tracking branch 'upstream/master'
Adapt to dedicated-api changes and a bit of cleaning in Storage class
Merge branch 'new-dedicated-api' of https://github.com/NewboO/manialive-lib into new-dedicated-api