Fixes: MPAA Rating & Dual Images

MPAA Rating:
Works for ANY rating regardless of the US types
(Thanks to Luzifel for pointing out)

Dual Images:
Commented out the parts for images (posters/banners/etc)that already exist in the LocalMedia.bundle Scanner, to avoid having double records that clatter & increase the size of the library for no reason.
Merge pull request #19 from crazyrabbit0/master

Fixes: MPAA Rating & Dual Images