Linux + glfw (ubuntu 13.04)

this time with 40% less junk code!

cmake:
- added FindAwesomium
- fixed "awsomeium" typos
- findGLFW3 looks for libglfw3
- extra `-l` switches added for X11/glfw compatibility

source:
- include wglew.h is blocked on *nix
- glewExperiemental set to TRUE (fixes some context problems with using X11?) (should this be guarded as *nix-only?)