Updater: add some javadoc

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Updater: make 'install them all' non-conflicts

When there are dependencies that need to be installed, we'll just
treat them as messages, not conflicts.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Fix UpdaterTestUtils#show

Some directories changed...

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