Add glew-1.10.0
Removed glew binaries

They were compiled with Visual Studio, so don't work with MinGW.
Glew works

I think glew links correctly (statically) now. Built it using the
mingw-build-glew.bat file (see there for more info). Deleted most of the
other files from the glew source, since we'll just be using the library,
not changing it.