Chapter 2: Fundamentals updates

Replaced reference to cranium.js with backbone-min.js in example HTML.
Made capitalization of Model, View, Controller, and Todo consistent.
Minor verbage changes (most significantly, added sentence in View portion of example noting how View's render generates content of DOM element using associated Model).
Merge pull request #300 from dcmaf/gh-pages

A few updates to Chapter 2: Fundamentals