orientation not reserved

[panlina]

The orientation info in exif is not reserved, thus the image mis-oriented in image viewer.

[chrisben]

It looks like there's a withMetadata function that ensures exif is saved. @panlina could you please try adding a line

.withMetadata()

there before toBuffer: https://github.com/chrisben/image-thumb/blob/master/services/resizer.js#L93 and see if this works. Thanks!