Added augment and modified lexer.

I own two libraries which I would like to be featured on microjs.com:

1. [lexer](https://github.com/aaditmshah/lexer "An elegant armor-plated JavaScript lexer modelled after flex. Easily extensible to tailor to your need for perfection.")
2. [augment](https://github.com/javascript/augment "The world's smallest and fastest classical JavaScript inheritance pattern.")

Please accept this pull request.