-some minor formatting changes
-DialogSet TODO note added 
-fixed up isAccepted - added missing states 
-fixed up isReliable to ensure that response have Requires as per RFC3262 
 (supported only is not acceptable)


git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-uasprack-20130904@10485 ddefafc4-47db-0310-ae44-fa13212b10f2