Roadmap

This will be a major restructuring of the library's backend to use a relational database via the  Sequel library instead of a BerkeleyDB. The BDB backend works great, is fast, and I've had little trouble with it, but it causes other people a great amount of trouble. This conversion will also allow for an easier path to read-only access, which I've never quite gotten working with the BDB backend, and a relatively trouble-free shared lexicon over the network.