Add more tools to stackhtml org

[rreusser]

See: this comment.

I've given it a shot and the tools listed there work great with documentify (apart from the extra command as noted in #16). There may be lots of hyperstream-based tools that could find a home here (some of which exist already and some which don't). I currently have the time to make some things happen here, but am seeking feedback on whether that's the plan or intention or if other people have thoughts on this matter. Thanks!

[yoshuawuyts]

@rreusser sounds great! — Yeah, that's definitely been the goal of the org all along. Added you as an owner; feel free to add people, projects, repos as you see fit! Would definitely be cool if we had a good collection of modules to modify HTML with :D