- Added better support for 'verbose' log output from P4 and Process commands (SpewIsVerbose arg and TraceEventType flags)
- Added new P4Connection.DescribeChangelists() that provides full changed file lists and edit types
- Added even better support for full changelist descriptions to P4Connection.Changes() function
#codereview Robert.Manuszewski, Gil.Gribb
[CL 2052302 by Mike Fricker in Main branch]