Improve the ergonomy of the application by removing the button to select of the zones.
Adding the definition of the differents fields except the gpsGeom_id.
Change the CharacteristicsFragment and ZoneFragment to use only the Vector<Zone> of MainActivity.
Creation of the class doing the convertion into differents type of geon an string,
Just on function define.
Fix merge.
Merge pull request #44 from nicolasdavid/dev_database

UrbApp_dev_database : local registring methods
register element types in database and instanciate them thank's to buttons in test interface