New data definition

Merge Convicted into Conviction
Update test data to new model
Adapted to new model

CaseDatastore
(/=) Adapt queries to new model
(/=) Simplify suspectsForCaseQuery

CaseDatastore, CaseDatastoreInterface, DatastoreInterface
(/=) addConvictToCase is obsolete

ConvictionDatastore, ConvictionDatastoreInterface:
(/=) New interface&query adapt to new model

Conviction
(+) add new attributes to conviction from new model

ConvictionCreationServlet
(/=)use new interface
Todo, Issues for 11 april
Slightly cleaner error handling in conviction creation
Updated Queries to new model
Merge branch 'unstable'
More todo,issues