* Copied join map from Mobile Control
* Started implementing for JoinMapBase
* Made some changes and improvements to ZoomRoom for handling Directory stuff
Adds new interface for Codecs IHasExternalSourceSwitching
Adds ability to set and clear External Sources in Cisco Spark device class
Adds ability to send sources from the source list to the Cisco Spark in the "EssentialsHuddleVtc1Room" room
[ ] still needs parsing when source is selected on the Cisco touch 10