Bring the library listing up to date

At the moment, the old website is wildly out of date, and the new one contains only a small fraction of the libraries. That really needs to get fixed, ASAP.

We need to take stock of all the libraries in the TL ecosystem, and make sure they are all listed in the new website. For each, we need to decide whether it is in "incubator" status, or is fully-fledged. (Do we even have a crisp definition yet of what that means?) Make sure the website reflects that accurately.

We also need to decide which projects are front-and-center. This is seriously not obvious (and there's a case to be made for choosing randomly), but we need to think through what we're trying to accomplish on the front page, above the fold, and make sure we're succeeding in that.