Use uppercase names for forms

Lowercase was easy in Python, but it just creates busywork mapping to
exported struct fields with gorilla/schema.
Use absolute URLs for static content

This popped out as soon as I started using URLs other than /[^/]*
Beginnings of a 'New Game' form

 - Ported another template over from Django
 - Consolidated some db code
Fix home title
Stub of "new game", minus the game parts