Added Hello demo canvas.

/lib
	/client
		/hello
			Hello-specific code (styles, scripts, shaders)

		/util
			/vec.coffee
				Vector creation short-hand

		/index.jade
			Includes vendor scripts, main script, styles; provides #simultor

		/main.coffee
			Requires the Hello and renders it to #simulator

		/vendor
			Zepto, Three, Require

	/server
		/assets.coffee
			Correctly catch missing files

		/server.coffee
			Hack to handle text.js correctly