Addresses Issue #1 -- provide $field variable in the created fixture.

Hey,

So, I found your Cake fixturize shell the other day and thought it would be useful to also generate the schema. Apparently, I wasn't the only one.

Anyway, take a look and tell me what you think. I included a '--no-schema' option just in case people really don't want it.

Thanks for throwing this out there in the first place!

Jason

edit: typo in title