Fiji Updater: use the remote bootstrap.js

The bootstrap.js is much easier to update than Fiji_Updater.jar
itself. So let's use that instead of the Adapter. Since Fiji always
shipped with Javascript, we should be able to get away with using
that language even if some users might still be stuck with Java < 1.6.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Fiji_Updater: deprecate unused classes

We should really stop using the Adapter and friends; this was a
well-intentioned attempt to avoid using Javascript directly, but this
developer learnt his lesson.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Merge branch 'updater'

This replaces the Fiji Updater adapter with a version that uses
Javascript to fall back to using the remote version of the updater.
This gives us much more flexibility to fix things quickly by simply
updating Fix_Updater.js in the Fiji source code repository on GitHub.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Fix 'Align by line ROI' without scaling but with rotation

The rotation was exactly the wrong way round.

Reported by Judith Anlauf.

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