Computes custom Levenshtein automata. A lot of cleanup.

Since v0.1.1, a lot of work has gone into a script for building our own Levenshtein automata. Now we can support transpositions as edit operations, and make use of a nice speed-up that is coded into the Levenshtein automata.

Also, there's a lot of cleanup, renaming and re-factoring. Not as much as I'd wish, though. It's a long way to go before we can call this a clean and tidy project.

Another pre-release with mostly cosmetic code changes.

v0.1.1

Add warnings at build time. Fix a lot of warnings.

Very first release, just to get started.

v0.01

Catch exceptions by reference! Changed that at least in all command l…