put in latest dev version
put in latest dev version

Jens has been editing gui.js too, and I'm confused about what's
supposed to be there, so I downloaded the latest dev version and put my
edits there.

ericrosenbaum/BeetleBlocks,jmoenig/Snap--Build-Your-Own-Blocks,jmoenig/Snap--Build-Your-Own-Blocks,ericrosenbaum/BeetleBlocks