Add proposition struct.

Sygned-off-by: David Carlos <ddavidcarlos1392@gmail.com>
Sygned-off-by: Lucas Mattioli <lucas.mattioli@live.com>
Created a initial class that tests the Database.
Added exception to the insert methods of DAOAbstract and PVMPDatabase.

  -  squashed: Added excpetion handler at getWritablePVMP() and getReadablePVMP() at PVMPDatabase class.
Refactored the ControllerDatabaseTest class.
Fixed the bug that would show a toast forever if the user clicked many times on a button.
Adapt the table names to the parser database that will come.

Sygned-off-by:  Lucas Mattioli <lucas.mattioli@live.com>