[Development] Rotating JPEG images by default

[Rainer Keller]

> I would like to mention one extra relevant detail. While this was implemented 
> for 5.4, it was not working in 5.4.0, and was only fixed for 5.4.1. So sofar 
> only 5.4.1 has had EXIF orientation automatically applied on JPEGs. This also 
> raises the question about what to do for 5.4.2?
I actually worked, theoretically. There was a bug with the endianess
when reading the data field. It worked when data was generated on little
endian machines but all photo cameras are big endian.
This means only photos taken on x86 machines would have been rotated.