The Autoload Generator was not behaving exactly as expected.
This PR is an alternate version of #203 based on some of
@stof's input on that PR.
The main differences are:
* The main package is added first instead of last
* parseAutoloads returns a different structure:
array('psr-0' => array('Ns\\Foo' => array('installDir')))
* dump and createLoader updated to account for new structure
Benjamin Eberlei