Added "dev mode" for automatically creating tables as needed

[dhotson]

This change can be useful in testing environments where you need to setup the schema, but you don't want to maintain a bunch of schema files.

A caveat, I haven't added any test cases for this. I noticed the Pheasant class doesn't have a test case already. Should I add one?

[mtibben]

hmm.. I wonder if it would be better to create a hook or event where a closure can be executed. That would make it more extensible instead of handling such a specific use-case

[lox]

I agree with @mtibben, lets find a better way to do this. Closing in favor of #40.