cubicweb #1122378 Have a SQL dump/restore option [done]

Right now we are dependent on the binary format of pgdump which doesn't always work when versions differ. For example a 8.4 dump will not restore with 8.3 client or server.

... and it could be an extra plus for compatibility with other dbms.

prioritynormal
typeenhancement
done in<not specified>
load left0.000
closed by<not specified>