Added new modules
Merge branch 'experimental'
Fixed high scores!

(I call hacks!)
Set start state to correct state
Split pgxtra.py into pgxtra package.
Merge branch 'master' of github.com:CodeSkool/SimpleGUI2Pygame
Split up breakout.py into various files, one for each class, plus the constants.
Cleaned up imports and code.
I was robbed!
Merge branch 'experimental'
Added rebound sounds to breakout.
Merge branch 'master' of https://github.com/CodeSkool/SimpleGUI2Pygame
Added sound files (duh).
Fixed sounds.

Matched sound to event. Shortened sound files and moved play calls to make quicker sound reactions.
Changed ui get_sound method to accept one sound file.