=TrailGroup scope renamed to Trace.  Parameter checking in init method and return code.  Message queue opened before thread create, so early messages are no longer dropped.  Marker IDs hash defined in the header file.
comment change.
markups.
Don't close and purge the message queue if connection to SAS temporarily drops.
markups
fix operator bug.
max string lengths in logs.
Merge pull request #17 from Metaswitch/450089

Rename TrailGroup scope to Trace.
init returns a return code.
No sleep should be required after init (sas-client library should change to open the message queue on init - confirmed with AJH and ME that this would be better).
sas-client lists marker constants.
no messages dropped if SAS connection temporarily drops (no longer closing and purging the message queue).