Added Halloween pictures - fixed selectmenu and startup to allow autorun via URL
Workaround for atan unary minus (documented at https://code.google.com/p/chromium/issues/detail?id=308366 )
Added mysteriously missing preload.js file
Merge branch 'master' into structures-grammar
Increasingly working version with support for the "simulation model". Decimal constants broken in grammar
Numerous improvements, leading up to DODECAHEDRAL PURSUIT: support for return, %, bare function calls, each, transform and others in the grammar. Added in 4x4 antialiasing for improved preview, and a basic CodeMirror highlighting mode. Improved markup layout to avoid misplaced scrollbar with 2d canvas.