Get rid of preloading sound since browsers pull the files anyway.
Use web audio api if available to improve sound on mobile devices.
Add comments, remove some unnecessary checks.
Get rid of clone business since we don't need to be playing lots of sounds at once and it breaks IE.
Add comments.
Comments and volume option.
Merge pull request #29 from tobyk100/master

Get rid of preloading sound since browsers pull the files anyway.