iface: draw buttons and mouse.

Signed-off-by: mkhropov <mkhropov@gmail.com>
Merge branch 'master' of https://github.com/mkhropov/Elem

Conflicts:
	graphics/Renderer.java
	iface/Input.java
fix: derping colors

Signed-off-by: mkhropov <mkhropov@gmail.com>