Fix Image imports on Fedora 19

More info here: http://lists.debian.org/debian-python/2013/02/msg00017.html

Though Fedora doesn't seem to provide those back compat imports.
Merge pull request #3 from crobinso/fedora-pil-fix

Fix Image imports on Fedora 19

Reviewed-by: Adam Litke agl@linux.vnet.ibm.com