Adds 'uso_bebida' to the model
Adds field 'alternativa_viable' to the model
Adds field 'funcionamiento_verano' to the model
Fixed small typos
Adds the 'Caja rural' to the available values for tipo_organizacion
Adds 'tarifa_variable' and 'cuota_variable' to the model
Adds two new migration scripts
Does some refactoring
Fixes a couple of bugs