Cleanup.

* clean out unused properties in Sample class
* clean out unused properties in table DDL
Major update.

* move sample properties into a Map in the Sample class, remove old SampleProperty
* put all properties into the Property enum
* handle all validation as regex patterns in the Property enum
* normalization is moved into the Property enum, now validation and normalization are two separate paths
* expanded the number of Properties that are validated
* cleanup some more references to MySQL
* change hibernate to 4.2 version