Added a keybinding to toggle commenting a highlighted portion of text on Ctrl+; and updated an example in doc.txt to use the new syntax for lists.
Merge branch 'new-world' of https://github.com/brownplt/pyret-lang into new-world
for now, do this, which is small enough for browsers; find a way to clamp this better
new bootstrap dropping check blocks appropriately
copying the fix to drop check blocks when not needed, and re-bootstrapping
Merge remote-tracking branch 'origin/new-world' into spinnaker -- using spinnaker's bootstrap

Conflicts:
	build/phase0/pyret.js