wrapped up logging and negotiator handling for registry

- finished negotiator configuration loading refactor including  connect-all-on-startup mechanism
- commented out sections of old code around logging and configuration now removed
- uncommented OpenSublimeSettingsCommand
- starting to refactor CollaborateCommand
- initial stab at a NegotiatorListener interface for UI callbacks
- BaseNegotiator now stores and provides a getter for an id, registry module sets that as the negotiator key
NegotiatorListener interface swapped out for typical Observer-Observable pair