Let pom-imagej manage which ImageJ 1.x version we use

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Fix fiji-lib version

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Avoid depending on fiji.FijiTools

This class is in fiji-compat... but we don't need it.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>