Renamed sessionId to _sessionid to better conform to the spec.
Renamed sessionId to _sessionid to better conform to the spec.

jbeard4/SCION,jbeard4/scxml.js,jbeard4/SCION,jbeard4/SCION,mattoshry/SCION,mattoshry/SCION,mattoshry/SCION,jbeard4/scxml.js