Fixes #8 with more natural bouncing.

Cleaned up some potential Concurrent Array Modifications.
Add sfx for #12.
Fix #12 with a SoundPool and a single .wav.

Allegedly works on SGS2.
Sound issues on CM 10.3 VZ Galaxy Nexus.
Merge branch 'iss12'
Merge branch 'iss8'

Conflicts:
	src/com/relurori/breakout/MainPanel.java