Implemented windowed fullscreen mode.
VP9 compatibility hack: don't render black drop targets. Doesn't work on TZ though since there the color is non-pure black?!
*) Fixed a very subtle index bug on ramps which could lead to crashes
*) Added rudiments of a tracing framework
Fixed crash with blinking light.
Made ramp texturing use clamping.

This fixes the single-pixel line on the AFM beta apron. The alignment
option should probably be renamed.
Removed old colorkeying enum.
Major cleanup to player initialization and transformation matrix management.