Setup the RethinkDB by default

When I created my first Kilt app and tried to create my first object, I got a missing database error.  I created the database, and then I got a missing table error.  I created the table, and the application worked.

I meant to hop in the codebase to add the default creation of these things, but I saw that work has already been done.  It's even called in the dummy app under test, but that setup code is not in the initializer.  

So I just copied the call over.