Tabular readme

Sometimes, it's useful to line up text. Naturally, it's nicer to have the computer do this for you, since aligning things by hand quickly becomes unpleasant. While there are other plugins for aligning text, the ones I've tried are either impossibly difficult to understand and use, or too simplistic to handle complicated tasks. This plugin aims to make the easy things easy and the hard things possible, without providing an unnecessarily obtuse interface. It's still a work in progress, and criticisms are welcome.