iPhone Camera Roll has created .XMP files causing photo import crashes in Windows
As "TJ Luoma" points out in the comment, the XMP files are used to allow non-destructive editing. It's a great idea but it's a very new standard (?) from Adobe and is therefore not adopted properly by everyone yet.

http://www.adobe.com/products/xmp.html

The new Apple Photos app (due to come out in USA Spring 2015) syncs changes between devices using this XMP concept. That software should be able to read the files and edits properly.

http://www.macworld.co.uk/feature/mac-software/release-date-for-mac-os-x-photos-app-3586301/

In the mean time, there's not much you can do. Perhaps Adobe have an open source solution. In my experience, the XMP files are not sent from the device (iPhone 5s tested). Therefore, iPhoto 9.6, "Image Capture" on the mac and Google Picasa all failed to read the photos properly.