Remove graphics, start from fresh
client: Add a basic main.c
GLFW !
Added linmath lib
shader loading
Add basic rendering.
Move rendering primitives to renderer.[ch]
Make the window floating.
Render rectangles !
Change background color to black
shader loading enhanced
client: shader loading
Merge branch 'opengl' of github.com:needs/anko into opengl
fixing conflics
Merge branch 'opengl' of github.com:needs/anko into opengl
Add basci texture rendering, don't work for now.
client: time handling and basic event processing
generation improved:
		   - water lake are now more realistic
		   - water shattering isn't randomized anymore
Merge branch 'opengl' of github.com:needs/anko into opengl

Conflicts:
	src/client/main.c
Fix image display bug.

Also free the vertex array object correctly.