base64-0.4.0

It's been over three years since the last release, so it's well time to put a version tag on the code that everyone has been using since then.

This release is not perfect. There are many ways in which the library could be improved, but anyone who has been running off the tip of the master branch for the past few years can now anchor to an official release.

Making this snapshot will free the road for some larger changes in how the library is structured.