Renamed FeatureHandler.py to PychrmStorage.py
Changed FeatureHandler to PychrmStorage in tests
Renamed PychrmStorage.py to PycharmStorage.py
Updated tests for PycharmStorage
Changed scripts to use PychrmStorage classes.

Also added open/close methods to ClassifierTables and made parent close method optional (to prevent session being prematurely closedwhen the table is closed)
Removed scripts/TablesScriptTest.py