Creating Sketch plugins with JSTalk

[Sketch](http://bohemiancoding.com/sketch/) is a ridiculous good design tool. It has a boatload of the useful features I've been waiting for in a web/app design tool for as long as I've been designing. Not only does it kill in features, it's also possible to script the app with plugins written in trusty ole JavaScript. I'll talk through how they work and the endless possibilities for what can be done with them. :speedboat: