starting GLFW3 window implementation
check for glfw3
upgraded to glew-1.10.0
reset GLFW window-hints before re-setting them
make GL-context current before creating GemWin
properly closing GLFW3 window

by polling for events.
right now we are polling 3 times, i wonder whether this can be done more elegantly...
initialize window (with DEPTH!)

which also fixes the rendering of light.
Updated copyright dates