Compress SAS parameters that contain large XML chunks
Remove memento_enabled option - always on
Update cpp-common
Merge pull request #25 from Metaswitch/iss21

[No review required] Remove memento_enabled option - always on
Merge remote-tracking branch 'origin/master' into sas-compression
Take latest cpp-common and sas-client
Merge pull request #24 from Metaswitch/sas-compression

[Reviewer: Andy] Compress SAS parameters that contain large XML chunks
Change Metaswitch submodule refs to ClearwaterCore