Added Entertainermissions
Changed Entertainermissions

They now check for distance to waypoint, if player is performing, in our
case dancing, and have a hardcoded 10 minutes timer.

Entertainermissions now have payout after 10 minutes.
TODO: test if crash, make the endlocation a Cantina or theater
Merge pull request #1167 from tacef/EntertainerMissions

Entertainer missions