jira 648: modify lc process logic when node backward one batch!
jira 649: state transfer's null pointer exception lead to without unlock , at last delivery thread wait for lock, cannot work!

jira 643: miss connect start process between old node and new active node;
jira 646: tomlayer's last cid set problem

refactored the code of mac generating with factory mode and changed the mac algorithm to HmacSHA256;

* master:
  upgraded version to 0.6.6.RELEASE;
  upgraded version to 0.6.5.RELEASE;

# Conflicts:
#	pom.xml

removed the unreasonable attributes in TOMConfiguration and refactored the message received mode of ServerCommunicationLayer to subscription mode;