[aquaria] Mostly-working 64-bit patch

[Ryan C. Gordon]

> Just one thing, don't include /usr/include/gl in the cmake script since 
> that's platform specific. Same for -lGL in the linker, given that in 
> Windows is -lopengl instead, to give an example.

No platform should link directly to OpenGL; we load it at runtime.

What part of the included gl.h didn't work in 64-bit, Peter?

I'm probably going to apply this patch, and remove the GL bits for now.

--ryan.