Refactored startmusic.py a bit
Added xp gain to music performance.
Experimented with startmusic.py
Added some client messages to the startmusic command code
FIXED Incorrect music playing for each instrument
ADDED Player Ability check to playing music
ADDED Player notification messages for failed music performance checks
ADDED 'canPerform' method to EntertainmentService
ADDED 'getAvailableSongs' method to EntertainmentService
FIXED animations while playing instruments