Remove toJSON calls on payloads where it isn't necessary
Stop trying to force the payloads.offer object into what the conversation window needs, by providing an explicit structure
Better semantics for SPA message payload mapping.
Added move-accept SPA event payload & handling.
Added support for call termination on move-accept event received.
Merge pull request #328 from n1k0/call-move-acknowledgment

Call move acknowledgment
typo
Merge pull request #327 from Standard8/toJSON-simplify

Remove unnecessary toJSON calls, and simplify message sending when opening the conversation window