Adding 3D Models for Farm

3 Models (Corn Stalk, Cot, Small Dresser)
Changes to the Textures will most likely occur. Current Textures are
placeholders.
Fixed Add Models SQL Query

I typed . instead of , and also didn't type in the ID to put in id
field. My bad..
README.md

Information about using Assets and Importing custom assets.
Merge pull request #5 from Soganatsu/master

Added 3  models