cowdb1.0.3

I was not planning on doing a release today, I'd rather spend the time on COODBMS right now. But then I found this bug. Turns out the internal nodes were not as transparent as they should have been. So this is an important bug fix, especially if you are evaluating CowDb for a reasonably sized application.

Now there are some changes planned for CowDb which will break backward compatibility. But right now it is important that CowDb be good and solid. I'll release those planned enhancements as a group--in the 1.1 release.