doc refinement
getZooKeeper() should fail if the instance has been closed
make ChildData constructor public for access from unit tests and such
Fixed some places where background callbacks weren't checking the event result code
Merge branch 'master' of github.com:tedpearson/curator into CURATOR-102

This closes #4
Major issue! Thread that was canceled due to CancelLeadershipException was getting re-used and thus exiting immediately. Instead, a new thread from the pool should be used
Fixed a slew of javadoc errors
latest apache parent pom
maven-release-plugin v 2.5 - fixes blocker bug
[maven-release-plugin] prepare release apache-curator-2.4.2
[maven-release-plugin] prepare for next development iteration
Merge branch 'master' into CURATOR-96

Conflicts:
	pom.xml