Adding the ability to edit pastures after placement.
How to use it:
1. Go into build mode
2. Click on a pasture and you will see a edit button next to rename
3. Click on it and place the fence you want. Same way as when you place a new barn
4. Save, and follow the steps (meadow or not)
5. You are done :D
IMPORTANT NOTE: Cancel editing, will not go back to your old pasture, it will go back to the default pasture.
I am working on fixing this issue
Added multiplayer support
Added check for when new fence is smaller than old fence
