adding extend and augment methods off from express-yui module to allow others to extend express or augment an app instance manually
Merge pull request #10 from caridy/extend-augment-express

adding extend and augment methods off from express-yui module
we do not need tests or doc conf
whenever we try to identify a yui module, we do not really need require or module, otherwise it will probably execute scripts twice. if the file is a yui module, then it should use YUI.add() to wrap things.
bumping version for 0.4.2
Merge pull request #11 from caridy/master

improve yui module detection to avoid executing arbitrary code
merging upstream 0.4.2