2to3 checkpassword, use python3 specifically.
Add and use YAML-based menu file config.

This is to make changing the menu easier, make it easier to have
different menus in different versions, and also make it easier to
bring up MyURY on new databases.
Remove spurious macro expansion.
Merge branch 'feature/menu-config' into develop
Wrong path yo
Make menu file name make more sense
Merge pull request #4 from CaptainHayashi/develop

\o/