Create the hunts table if it doesn't already exist

I just realized I was probably missing a necessary index on the hunts
table, meaning I need to destroy it ad recreate it. But I don't want
to do that manually without any code to capture what I did.

And if I'm going to write code, I might as well have that code called
implcitly as needed. So that's what's present here, the code necessary
to create the hunts table if it doesn't already exist.