* Spacing
* Upgrade to v0.11.1
* Add version numbers
* Update to latest React & LiveScript
* Freeze traceur at 0.0.58
* Upgrade Traceur to 0.66
* Array comprehension is gone from ES6; adjust accordingly.
* Reflect the readjusted ES6 syntax in chapter writeup
* LiveScript 1.3.0
* s/continue/return/
* Beginning to incorporate review ideas from john
* Refactor block scope constants
* Explicitly mention AngularJS as per john
* Add a "why" section to main.js as per John Morrissey
* Add calc() flowchart as per @jwm's review.

  That's all, folks!