Revamped the entire audio system to allow multiple audio channels, default
hardware limitation is 128. Channel 0 is reserved for background music.
Emitters have no been finished completely, and sounds still need priorities.
Redid the audio system to ensure the old and new sounds system work together
in conjunction and outlined the basic fall off models as well as added
a few extra functions for adding and deleting sounds at runtime as well
as seek them to specific offsets.
Removed AL.h include statement as ALURE already includes it. So it should
work fine on Windows.
Merge pull request #53 from RobertBColton/master

Revamped Audio System