Begin Varieties -> Crops and Varieties
CropCount form, move variety to crop
Don't require old varieties
Migrate Variety instances over to Crops
Register CropAdmin
Free cropcrount from Variety instances
Make more PEP8-y
estimates, Variety -> Crop
Remove unused import
Migrate harvestcount to crops
Remove unused tests
Migrate yum & yuck from varieties to crops
Mostly remove Variety