Added headless option to model constructor.
Added js files.
Added an example of a headless flock that renders as dom elements.
Added js files.
Merge branch 'headless' of https://github.com/bennlich/agentscript into bennlich-headless

Conflicts:
	lib/agentscript.js
	lib/agentscript.map
Commit/Push after Benny's Headless Pull/fuss/Merge
Merge branch 'master' into gh-pages