Start a new projects: ij1-patcher

This project will not depend on ImageJ2, but ij-legacy will rely on
ij1-patcher to provide an appropriately patched ImageJ 1.x.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Move some classes from ij-legacy into the new ij1-patcher

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
TODOs
fixup! Start a new projects: ij1-patcher