Scaffolding new classes for RealTimeAcitonQueue. see #100
Notifier now adds incoming socket events to RealTimeEventQueue.

see #100

- automatically fires action and cleans up queue afterwards
- Actions won't fire if stream_state.live is false
- Actions auto-fire when stream_state changes if live == true
- No UI or tests for this yet, but I swear it works.
tests for #100
don't create audio context in test suite. #100
Merge pull request #105 from cremalab/action_queue-100-rb

Real Time Action Queue