New Brewery Texture

As the Brewery is made out of Livingstone, I thought I'd make a texture
that looks like it since the current one is only a gray stone.
Feel free to modify the texture ~
Here is a picture of the Brewery ingame:
http://i.imgur.com/XetoaY1.png?1
Merge pull request #374 from Yulife/master

New Brewery Texture