compiling errors

[wix]

i saw just one part where i could expand the wiki a bit, that was the only thing that is needed .

Bullet 2.80 Build bullet, and make sure the libraries are put into the <install_path\lib> folder, and set the environment variables BULLET_ROOT <install_path>, and BULLET_INCLUDE_DIR <install_path\src> folder.

If cmake can't find openal directories just have to be set manually.