Compatibility with pyalsaaudio 0.8+

[a-musing-moose]

Hi all,

Thanks for all the work on pyspotify - awesome project!

I am running Ubuntu with Python3 - I wish to use the ALSA backend. Pyalsaaudio appears to have fixed the memory leak in the 0.8+ releases. Unfortunately they also seem to have made a minor change the PCM api.

Specifically there is no longer a card argument to PCM.__init__. There is however a cardindex argument that defaults to -1. From what I understand (very little) this appears to amount to the same thing.

[a-musing-moose]

Thanks @jodal! Much appreciated