Fixes #180 - adds grunt info to readme.
Moves grunt info after CLI and module use so the order is more logical.
Fixes #177 - processing incorrect content should not break CSS.

* Adds a warning on an incorrect content or a closing parenthesis.
Version 2.0.2.
Minor style changes.
Remove check for `process.hrtime()`.

Node.js 0.8 is required already.