Initial release of ALSA scenario library

I've now released the first version (v0.1) of the ALSA scenario (or use case) manager. It's currently a stand alone library and can either be linked against alsa-lib or salsa. This library is designed to provide userspace applications (e.g. Pulse Audio) with a generic API to change the audio hardware scenario or use case.

Features :-

• Scenario get() and set()
• Mixer alias (i.e. what is the correct volume control for scenario x)
• Scenario dump

The code is available as a tarball or via git.

Feedback and patches are welcome.