Remove copied exif-py and use upstream version
Remove exif.py from LICENSE file

This file has been removed, so no need to talk about its license.
Merge branch 'exifread'
Add requirements file for pip
Fix another exif to exifread change
travisci: install requirements
Update the README with new instructions
Add the script for batteries-included releases
Merge branch 'exifread'

Conflicts:
	README.md