Added missing postgreSQL install file

Converted to pgsql format from the mysql install file.
Also added missing comment syntax for config.php.

Proposed fix for issue with invalid redirection after making a new form.
Issue discovered when trying to make a new form and getting redirected to the edit page using an empty id GET.
See comments in commit for more detail on the fix.
Did a bit of digging and found this.
http://www.php.net//manual/en/pdo.lastinsertid.php
It says that postgres requires explicit declaration of the sequence name.
Not sure of how to fix that issue outside of doing a second query...

When using the serial type, it auto converts to `integer default nextval('tablename_fieldname_seq')` and creates a sequence of the same name.