In command-line mode, reuse local .jar files
In command-line mode, reuse local .jar files

When the ImageJ update bootstrapper already downloaded the appropriate
.jar files, we should just go ahead and use them. Of course, that means
that we should never, ever upload -SNAPSHOT versions to the update site,
but we should not do that regardless, anyway...

Signed-off-by: Johannes Schindelin <53fb8db7833fca1e1746dd8592f61048d350f64c@gmx.de>

imagejan/imagej-updater