Disabled autotiling definition in the tilesets as it's making the editor crash.

I'll fix that later.
Tweaked the Shroom and rolling stone collision areas to let them better interact with each others.
Added the third elbrus grotto map and preloaded all sounds in the second one also.
Kept working the on the path2 and cave 3.
Reverting VS project warning settings and .gitignore changes. This is a fork side only commit.
Adding a submodule for the VS2012 dependencies.
Fixing all level 4 warnings and higher.  This is a fork side only commit.
Update README