Include the welcome message in the .zip file

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Bump parent to preemptively-bumped version

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Bump to next development cycle

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