Started convergence of the Dao. 
Simplified Disease and GeneAssociationSummary classes to make them more flexible and need less legwork in the DB.
Added raw score cutoff filter to the Dao to enable IMPC to retrieve high-confidence data sets and PhenoDigm to pull back all of it.
Changed/added tests to reflect these changes.
Updated jsp and controllers to use the more simplified model.
Next steps - Solr indexing and dao...