BoostWaitlist

- Waitlist add and cancel sound triggers are off by default, and can be reenabled with '/boost sounds on'

- The /boost setreply command won't accept inputs that are so long that they'll cause Lua errors when sent.

- Fixed a bug in the Lib import that would cause initialization failure when no other enabled addon had the LibDBIcon-1.0 import.

- When the Booster trades gold to a boostee that has a balance, it will automatically reduce from that balance and whisper the reduced balance. This should make resolving outstanding balances easier when you're done boosting and paying everyone back their balance.