Problem with color channel flip

[joerg-s]

For me, the resulting images had wrong colors, they were blueish.
I figured that this is related to issue #178, so I commented out the channel flip
img[:, :, [0, 1, 2]] = img[:, :, [2, 1, 0]]
in the function bgr_to_rbg in the file autocrop.py .

This solved the problem.

Maybe there should be some check, whether the channel flip should be applied or not?

Thanks for the great tool, it saves me a lot of time.

Regards,
Jörg