Create an Rdio playlist from your Last.fm loved tracks.

I whipped this together pretty quick so that I could import my Last.fm
favs into Rdio, but I figured other people might also want it some day,
so I tidied it up and put it here.

I had to tweak Rdio's PHP API to use Zend because I'm way too lazy to
try and install pecl extensions in MAMP.

I really shouldn't include the Zend files, but I'm too lazy to make
them an external. YUS.