fix a typo

expose resolve and reject methods

code cleanup

use data as the first argument for whenDone

update README to reflect recent changes

support async function for #then

support asynchronous task in #add

just like Promise, but with slight modifications

fix a bug in factory method

    when an array is passed into a function produced by factory, the array is flattened

bump version

fix for data URI detection

fix for Firefox 3.6+