Now following raylib conventions & rebased on master

@hugoarnal example looks good but a bit simple, maybe it would be nice to move fordward-backward between directories

@hugoarnal example looks good but a bit simple, maybe it would be nice to move fordward-backward between directories

sure, will work on it whenever I have time. Maybe doing something with raygui could be interesting...

@raysan5 You can now progress forward and backward between directories! There's one thing I need your opinion on, it's the "raygui.h" implementation. I'm currently including it from the shapes directory but I'm conscious that this is a bad approach. Should I move raygui to the examples directory from the shapes directory, or copy it to the core directory too?

@hugoarnal thanks for the new example!