Now reading parameters from database

— Added Parameter class along with respective DAO and DAO interface.
Also edited Hibernate.cfg.xml to recognize the new model class and load
the data from the new file parameters.sql, which has instances of
Parameter.
— Added a Loader for Parameters
— The parameters are used when defining the sample sizes for each
supersense.
Added Sample selection

The application now automatically choses samples to pose as positive
examples of the mapping. Only the samples are mapped to semantic types
and persisted on the database.