updated todo.otl
rename 'test' to 'game'
corrected some target link library names and some include directory names
reorder target link libraries to remove link errors with OpenGL
make it work with glfw3 from github
added glfw as submodule (use git submodule init & git submodule update)
monolithic engine lib in release
removed cmake warnings when moving to cmake 3.0 (LOCATION is deprecated)
removed old references to glfw 2.7