docs: improve repo description
docs: improve repo description

PR-URL: https://github.com/iojs/io.js/pull/48
Reviewed-By: Mikeal Rogers <ec45fbf4814b5c556127a5ed8a24ac213bdcb77e@gmail.com>
Reviewed-By: Rod Vagg <f9f03903429036ef609ed7ca822fddfa76155c29@vagg.org>

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node