Merge pull request #181 from stevenzwu/master

Don't normalized column name to low cases anymore
Make uniqueness check of message key optional
Improved tracking of queue stats
Fix for issue 173
Fix unit tests for pull 181
Revert OSGI changes to pom.xml while I research how this breaks maven.
Revert previous change to pom.xml
https://github.com/Netflix/astyanax/issues/159
Fix inconsistent methods names in QueueStats
Exposes peeking messages to top level MessageQueue interface
API to peek all pending messages for a key
Fix for https://github.com/Netflix/astyanax/issues/161
Check for schema agreement before attempt to perform a schema change
Merge pull request #186 from Netflix/entitymanager

Check for schema agreement before attempting to perform a schema change
more comprehensive handling of nullable columns