Alert window during registration

When no metadata are pasted into <textarea> during a registration, the
user is informed about the need to manually fill in all the information.
locals-v6.js renamed to locals-v7.js
Merge branch 'regformwarn' of https://github.com/JanOppolzer/ResourceRegistry into JanOppolzer-regformwarn
Merge branch 'JanOppolzer-regformwarn' into develop