Adding in Audio Triggers w/ One Debug Sound

This commit will add two blueprints to the mater, one audio trigger
(one-hit) and another audio trigger (repeating). Both rely on physics
based collision and are represented by invisible cubes. The continuous
trigger will only repeat a sound if the object colliding with it exits
and reenters the trigger, however as of 11/8 both have been revised to
not discern what collides with them and will allow any object capable of
doing so to set them off (may be an issue in the future if the
continuous has a large group of objects enter collision range in a short
amount of time). This was done by removing a condition that would check
for the tag on a colliding object before playing the sound, as per
instruction. Commit made on 11/8/14 after checking out the current
version less than 30 minutes prior to commit.