Assess Javadev's fork

[mattbucci]

@javadev Implemented changes to the rewrite logic such as:

• Add date_format support.
• Add support for virtual column.
• Add support for replace into.
• Fix update column sql.

https://github.com/php4dev/heroku-wordpress/commits/master/wp-content/pg4wp/driver_pgsql.php

Assess whether any of these changes should be pulled into https://github.com/PostgreSQL-For-Wordpress/postgresql-for-wordpress/blob/v3/pg4wp/rewriters/SelectSQLRewriter.php