Re-support type="text/traceur" to enable global semantics for scripts
	Fixed #822 (with additional test in runner.html)
        Changed Loader used by WebPageTranscoder to be a
		TraceurLoader
	Added express as dev-dependency so that running
		nodeExpress.js will work
	Added serve-index package due to deprecated
		express.directory in newest version of express.
	Added Intellij IDE files to gitignore