2.0.0

Changes the aspect from targeting all published resource files to
instead only target generated thumbnail images from the media package.

This solves three important issues:

Only generated thumbnails will affected instead of all image files
Thumbnails will only be processed once when generated
Original files won't be affected since a thumbnail is always created
Removes compatibility with Flow in general and instead relies on the media package in a version requiring Flow 3.x. Which means it's no longer compatible with Neos 1.2.