Improve Package Control listing - mainly showing ST3 compatibility

If you visit the VintageLines [Package Control page](https://sublime.wbond.net/packages/VintageLines) now, it's kind of sparse - no README, no Issues or Donate links, and most importantly it says it's ST2-only, meaning it can't be installed via Package Control in ST3. I updated `packages.json` to the new [schema 2.0](https://raw.github.com/wbond/sublime_package_control/master/example-repository.json), so all of that is filled in automagically from GitHub. You no longer have to manually update the file with every new release, the `"details": "https://github.com/tmanderson/VintageLines/tags"` does all that for you.

I also took the liberty of adding myself to the README :grinning: 

So, all you should have to do is merge the pull request, generate a new release, and Package Control should update itself in the next hour or three. Let me know if you need anything else!

Matt