This maybe not Raspberry Pi specific.

You actually commented out listen_addresses completely. I'd try listen_addresses='*' or set it to your public IP. Then restart the server.

http://www.cyberciti.biz/tips/postgres-allow-remote-access-tcp-connection.html

This maybe not Raspberry Pi specific.

You actually commented out listen_addresses completely. I'd try listen_addresses='*' or set it to your DHCP or public IP. Then restart the postgres server.

http://www.cyberciti.biz/tips/postgres-allow-remote-access-tcp-connection.html