See null, apex site is less scary, and can query table size

A few little things for today:

1. The main landing page at https://pgscope.com looks a bit better and has more working links including one to this blog.
2. I set up email forwarding.
3. The app now supports schema names and table names in query results.
4. You can now easily use the same query on alternate databases.
5. It's now easy to see if a column is nullable or not.