Fix clean rule of Makefile
Refactor the commonJS code and implement the webserver command for nodejs.
Merge pull request #28 from r-gaia-cs/fix-make

[minor] Fix clean rule of Makefile
minor change: explicitly request a LALR(1) parser.
Merge branch 'master' into gh-pages
Live demo: automatically update the preview when the user release a key.
Merge branch 'master' into gh-pages