Update readme and license

Also add integration examples

Initialize backlight and LCD during visualizer_init

Compile the user visualizer

Add visualizer

A generic visualizer that supports animations. There's a few
predefined keyframe types included, and more can be added by the
user.

Add LCD backlight support

Also possibility to disable the LCD support

Add makefile that includes ugfx

Add uGFX submodule v 2.4

Add MIT license

Add readme