Wrote randomSoundFromDirectory method.

Signed-off-by: tfliu <thomasliu02@gmail.com>
sound files added to src/res/sounds

Signed-off-by: kcperk <kcperki2@illinois.edu>
minor changes to SoundGenerator
added new method to send path to the function
Merge branch 'master' of https://github.com/akshatgupta95/hackillinois-Hack