Really basic automatic interpollation between sand and grass
Merge branch 'master' of https://github.com/TheElephantSeal/open-source-game
Interpolation looks absolutely horrible :(
Huge ECS overhaul

I can't really take credit for it, I used the anax ECS for reference very extensively. Also, this uses a lot of C++11 variadic template magic, so it probably won't work on VS2010.