refactor varname
rename Overlay -> Display
Ground.setColor, new Ground div in progress
replace Ground rendering with a div fake, add Ground.DO_RENDER
remove horizon 2px tweak to fix hovering obelisks in the distance
animated shield loss effect
first working draft of Portal types split out into hierachy; add UTIL.panic
move all error() to panic() to stop and open debugger
fix ground plane not hiding in warp