1.0.4-Beta

Fixed jet.extend() cannot clone the deep object
Rename jet.parseDate() to jet.DateTime()
Fixed jDateTime cannot prase the string format propably
De-prototype some jet object
Simplify padding and margin unit hook coding
Added jet.Deferred()
Added jet.when()
jet.ajax() and jet.request() now will return Deferred object
Simplify jUnit object coding
Simplify jAnimate object coding