Started working on the -01 agreed changes:
 o OC-Feature-Vector AVP is now grouped
 o TimeStamp AVP changed to SequenceNumber AVP (of the same
   size, so embedding NTP 64 bits time is still possible)
 o Defined a new Features AVP that contains the feature
   flag vector. Optional and not needed for the base line.
 o Removed ReportType AVP.
 o Capability announcement in an answer direction is also
   an announcement and may contain multiple supported
   features/capabilities.. still at least one must match.

Signed-off-by: Jouni Korhonen <jouni.korhonen@broadcom.com>