Add web to source_dict and move r5 into DVD.
Merge pull request #26 from mmccurdy07/master

Play nicely with third party scanners that don't know about 'root'
Additional multipart movie support

adding 'scene' as an option to the stacking logic in order to better handle multipart movies that have been divided up by scene.
Merge pull request #27 from techdragon/patch-1

Additional multipart movie support
Don't crash if file was whacked previously.