cache LogEntry clazz/constructor
simplified LogAdapter to hopefully resolve Tomcat issues
Added debug logging for master state transitions
added more tests for unsol/read collisions
Fixed a bug where slave would cache defferred requests even after a layer close
Fixed a conformance issue with unsolicited

When the outstation receives a READ request while waiting for an
unsolicited confirm, it should abort any retries.
Merge remote-tracking branch 'automatak/1.1.x'
Prepared 1.1.1.RC2