Categorize Plugins List

[nixjdm]

The unofficial list should be categorized so that people can more easily discover plugins they are interested in. Possibly, we can combine the official and unofficial lists so the official ones are categorized too. We can mark the official ones as such in a different method.

The list is getting a bit long, and it's becoming more unreasonable to actually read through them all to determine which plugins you'd want, if any. Not to mention some are similar, yet not right next to each other (looking at you htmlmin and minify).