CryptoRedo SBT updates

There's one change worth considering, as it does manipulate the Maven Build:

Raph employed a pseudo-root folder to add an extra .pom to the project.  This was a sticking point during uptake, as I spent a lot of time trying to build diesel from that pom instead of the then-nested pom file.

In building IAW, I removed the extra root folder, moving everything up one level.  This simplified my build.  I'd note that it's possible to have IAW and the extra root folder, but that it is more complicated and error prone in the long run, because it doesn't stick to the standard convention.

You'll notice that the diff on this Pull Request is somewhat more convoluted due to the move.  I think git conflated the two pom files.  All there really is to see is that there's an SBT file now.