make sure to properly shut down metrics registry
Update changelog
OCD
Avoid overlong debug message

JAVA-240 #fixes
Avoid possible NPE in HostConnectionPool

JAVA-231 #fixes
Changelog update
Document that BoundStatement#bind can throw NPE

JAVA-226 #fixes
One more addition to the javadoc
Fix error messages
avoid multiple prepares per host with multiple sessions
Merge pull request #150 from aholmberg/1.0

avoid multiple prepares per host with multiple sessions
Fix changelog
Don't crash if replicate_on_write is null on a table

JAVA-254 #fixes
Make sure connections are returned to the right pool

JAVA-255 #fixes
Clarify javadoc