Changed Form inheritance for better setup of layouts.  All forms now have their "submit" button restored and you can choose custom layouts.  ControlProtocol has tabs.
Navigation pane now shows background color to indicate what sections you've completed on almost everything.
Fixed missing "Add" icon.  (Bit of a kludge)
Rearranged the inheritance of DiseaseSpreadModel to ensure separate accounting.
Added several conditional visibility fields to forms and rebuilt database.
Added tracing_program_delay to MasterPlan and made pdf shipping_delay_pdf optional