Improvements and fixes for the release script
Improvements and fixes for the release script

Should not try to modify the POM.
Should also push the tag to upstream.

walls-of-doom/walls-of-doom,walls-of-doom/walls-of-doom,mafagafogigante/walls-of-doom,mafagafogigante/walls-of-doom,mafagafogigante/walls-of-doom,walls-of-doom/walls-of-doom,walls-of-doom/walls-of-doom