Merge pull request #618 from mebigfatguy/master

Fix simple copy/paste typo with logging contexts
Add ability to specify columns for multiget queryColumns
Merge pull request #619 from tom-martin/master

Add ability to specify columns for multiget queryColumns
added check for null or empty on datacenter property for environmental configuration simplicity
Make the LockManager test take a bit less
Updated to use C* 1.2.4
bump up to Cassandra 1.2.5
Fix Java 7 test issue.
Merge pull request #620 from hector-client/auto-discovery-nulls

added check for null or empty on datacenter property for environmental c...
added latest to changelog
[maven-release-plugin] prepare release hector-1.1-4
[maven-release-plugin] prepare for next development iteration