JSJaCPacket: added helper functions '_getChildNode' and '_setChildNode', make use of them where appropriate JSJaCMessage: added setThread/getThread
JSJaCPacket: added helper functions '_getChildNode' and '_setChildNode', make use
of them where appropriate
JSJaCMessage: added setThread/getThread


git-svn-id: 25b8aa641ff207854030a5817cdb58f325152430@124 5ff7c7a3-1d2c-0410-94ce-ebea5ecf0e18

saimonmoore/jsjac,saimonmoore/jsjac,saimonmoore/jsjac,saimonmoore/jsjac