Add support of MPO (3D) images

[Illico]

http://forum.serviio.org/viewtopic.php?f=5&t=7273

http://forum.serviio.org/viewtopic.php?f=3&t=18158&p=97330#p97330

[Former user]

I think that adding the 3D file tag would help with this issue. more here [http://forum.serviio.org/viewtopic.php?f=3&t=15754]

If you Looking for files with xx in the name you would know how to trim the 3D image. [3DSBS] - Side-by-Side; [3DTB] [3DUD] - top n bottum or up n down

{As for the movies with 3D in the title that arn't 3D... they suck.. so who cares}