Merge pull request #21 from padenot/master

Mozilla Bug 859805 - Make libcubeb work on Android (2.3)
Add stream type support
Merge pull request #22 from wesj/master

Mozilla bug 809558 - Add stream type support
Mozilla Bug 861936 - Allow calling cubeb_stream_get_position while in the callback when using the pulseaudio backend.
Merge pull request #23 from padenot/unlock-getclock-pulse

Mozilla Bug 861936 - Allow calling cubeb_stream_get_position while in th...
Mozilla Bug 809558 (followup)

Pass in the channel when calling the ctor in the audiotrack backend. For some
reason this chunk was missing in 3ac8db8.