Merge pull request #1 from VanessaE/master

various fixes:
Merge https://github.com/VanessaE/mushroom
Merge https://github.com/VanessaE/mushroom
Merge pull request #4 from VanessaE/master

various fixes/tuning:
made Grass Look better
Use Novatux's node clone method to redefine the dirt and grass, so as to
just redefine the drops part.