Refactor protocol interaction with PJ

Many fixes/updates. Should correct #32.

Located and removed a couple of stray timers
Optimize/consolidate long if (match to single switch / case
De-duplicate some logic into separate functions
Handle auth errors gracefully
Recover from PJ errors
Reduce log clutter from status updates
Reduce net traffic: -- request static projector information (model/serial no) only once -- request long-term information (filter hours) every 10 minutes -- respect protocol Class on polling to reduce unknown command errors -- ignore certain actions when projector is not in 'On' state
added Toggle to Mute/Freeze/Power
typo on freeze action

Tested for many hours against the JBMIA emulator and a custom emulator.

bitfocus / companion-module-generic-pjlink