added new method supports(Class type) to allow for exception safe type support during initialization
added more testing so that this unit has compelte coverage including the new types and the supports method
now verifying that @HBaseField annotated fields are of a supported type during initialization. Cleaned up and simplified testing. Added verifcation that arugments passed to HBaseEntityMapper.save(Object) and HBaseEntityMapper.objectFrom(Result, Class) are valid HBasePersistable classes. Fixed bug related to @HBaseField. Cleaned up internal state of HBaseEntityMapper so that bad classed are kept in the maps