Initial work on animation

Add FPS counter

Run with SwapInterval::Immediate so that input feels responsive

Fix stupid bugs with path component

Fix text rendering bug on some systems

Beginning work on border

Use Orbitron font for clock

Run as fullscreen by default, add option to run in windowed mode

Load PNGs, background stuff

Add rotating square as framerate indicator

Fix coordinate issue with touch events

Implement touch component

Move background code into component

Finish implementation of radial gradient

Simple radial gradient (only two colors)

Finish implementing linear gradient rendering

Add support for rotation

Initial implementation of gradients

PathComponent: arc drawing

Some minor code cleanup