* mal_device_config_init()
 * mal_device_config_init_capture()
 * mal_device_config_init_playback()

 * Make device initialization more robust.
 * Add support for channel mapping.
 * Add support for 32-bit floating point formats.
 * Miscellaneous bug fixes.

As of this commit, this does not work in my testing environment. More
testing is needed for this one.

This is not yet fully implemented.

This commit is intended to just experiment with the idea and only
supports f32 -> s16 conversions.