Arfle casing sounds

Just as I described in issue #31.  The casing sound is actually supposed to play as soon as the trigger is released, but this code is such a mess.  Perhaps another time.
Moved to patch-1
Le sndinfo
Merge pull request #98 from PresidentPeople/patch-1

Merged pull request #98 from PresidentPeople/patch-1: Arfle casing sounds