Compress SAS parameters that contain full messages
Fix comment.
Fix mock SAS implementation.
Add mangelwurzel sas events
Merge pull request #196 from Metaswitch/mangelwurzel_sas

No reviewer requried: Add mangelwurzel sas events
Merge pull request #194 from Metaswitch/sas-compression

[Reviewer: Andy] Compress SAS parameters that contain full messages