[Bins] Image Rotation

[Loris Caren]

Hello, I've recently downloaded bins and found all the dependencies. I 
saw reference to an ability to pre-rotate images that were tagged to 
do so. I used exif to set the orientation tag (0x110) to 2 (which 
exif says is top-right) expecting to get a 90deg rotation. Instead I 
got a warning message as bins processed the files 'Orientation field 
illegal value: top_right'. Is this a bug, or am I misunderstanding 
the exif format?  (My camera isn't smart enough to figure out which 
way up it's being held).