Updated Variables Within Class Methods
Updated Variables Within Class Methods
Fielding's Additional Audio Class Methods
struct card_type
Fixed Exit Return Result on main() Function Exec of Exit
Fixed Audio (Channels) Init Bug; Audio Playback Works Again!

* I had confused the proper audio_channels value with available mixers,
  * whereas
  in this case -- our audio initialization constructor / routine is
  looking for
  physical hardware channels -- unsigned integer values 1..7 are common.
Removed Unnecessary Header File <array>
Typo Fixed
Renamed TTcards:: to this-> Where Applicable Within Class
Merge branch 'master' into feature_audio