Better Fields v3

Enhances stock fields, orchards, and pastures to be more forgiving and versitile. Easier, more forgiving placement; larger max sizes; more workers. Specific features include the following:

- Fields may be placed on any area where a villager can walk; this includes small slopes, 
  and most of those annoying single tiles of unbuildable areas. So long as a villager 
  can pathfind over it, you can make a field over it
- Max size has been increase to 60 square tiles
- Max workers for the crop field and orchard have been increased to 64 workers, and 16 workers for the pasture
  (necessary for massive farms)
- Orchards are made slightly denser; trees are planted in a 2x2 pattern instead of the default 2x3
- Crop Fields and Orchards can now be as small as 1x1 tile

Changelog:
=========
v3:
  - Orchards are made slightly denser; trees are planted in a 2x2 pattern instead of the default 2x3
  - Crop Fields and Orchards can now be as small as 1x1 tile
v2:
  - Crop fields no longer level hills, but overlay onto them
  - Crop field max workers increased from 30 to 64
  - Orchard max workers increased from 30 to 64
  - Pasture max workers increased from 4 to 16
v1:
  Initial Release