Starting a javascript curriculum, you guys!! 

**WARNING: DO NOT MERGE TO MASTER!**

There's a ton to do here, but I'm opening this early, so people can give me lots of feedback and **help out**.

Things to do:
- [ ] Replace the steps with checkboxes like these; they're too small to be big checks
- [ ] Write instructions for creating and loading a file in a browser, instead of just console.
- [ ] Write instructions for creating functions and using callbacks
- [ ] Write explanations of `this`
- [ ] Write a little single page app. (Think of something for it to do!!)