Merge pull request #2 from nlagrow/ivy-update

Update tower-1 ivy / door texture
Add weapon rack
Merge pull request #3 from sjstark/master

Add weapon rack
Merge pull request #4 from nlagrow/tower-spec

Tower spec
Merge pull request #5 from nlagrow/generic-textures

Add generic texture file
Merge pull request #6 from nlagrow/tower-obj

Add tower obj
skybox, tower, lockon
added troll screens