Changed: less false errors when PerfCounter can't be created. No VERY SLOW MSG on SystemInit (it's ok to rebuild for long time).
Fixed: don't report fatal error if background chunk validation failed due to FileBeingDeleted exception.
Fixed: fixed the way we protect TCP message queue from overflowing.
Fixed: non-success application exit was not logged as error.
Changed: LogPosition is inherent property of LogRecord, so should be common for all of records.
Merge branch 'dev' of http://github.com/EventStore/EventStore into Windows-Build