Added support to display score for the simulation in table.
Have server return 404 for invalid routes.
Cached the database connection.

Does not create a new set of connections on each usage.

Also, easier to change the database name, etc. since only appears in
single location now.
Moved passport configuration into separate file.
Added instructions for using the application.
Changed look of the page header.
Updated some of the views.

Fixed a typo (control -> controls).

Made sure lines do not exceed 80 characters.