Adding Audio kind and sample to enyo

It appears samples/packages.js was previously committed with Windows
line breaks. I've converted them, thus the apparent change on all lines.

Enyo-DCO-1.1-Signed-off-by: Jeremy Thomas <jeremy.thomas@lge.com>
Restructuring conditional

Enyo-DCO-1.1-Signed-off-by: Jeremy Thomas <jeremy.thomas@lge.com>
Changing enyo.Audio to extend from enyo.Media

Enyo-DCO-1.1-Signed-off-by: Jeremy Thomas <jeremy.thomas@lge.com>
Updating Audio sample

Enyo-DCO-1.1-Signed-off-by: Jeremy Thomas <jeremy.thomas@lge.com>
Merge pull request #317 from enyojs/GF-7556-jeremythomas

Adding Audio kind and sample to enyo

Reviewed-By: Ben Combee (ben.combee@lge.com)