Atlas: Changed video format to 640x480 and losslessly compressed. Added
most-recently-used files list. Stopped switching sidebar when selecting
tools, since it was getting annoying. Added Slow playback mode. Fixed
crash when resetting sim while projectiles exist.
Renderer: Added JS-accessible renderer.shadowMapSize to override the
size of shadow maps.
ShadowMap: Changed default depth texture bits to 24, since that seems to
go faster (see #180).
PolygonSortModelRenderer: Made more similar to other renderers, so that
the renderer.sortAllTransparent=true mode works better.
Projectile: Fixed update, so it interpolates smoothly.
Entgraph: Fixed promotion detection.
This was SVN commit r4876.
