Minor edits and punctionation in chapter 01-introduction

Light editing and punctuation fixes in chapter 01 (including adding serial commas,
which is debatable - they are recommended in American style guides, but may be less
accepted elsewhere).
Use appendTo instead of $.append
Fixes #281 - updating recommendations for model binder
Updates/Fixes #279 with revised text
Adding local copies of exercise 2 resources, updating URLs
Last fixes required for local builds to work again. Updated builds of index, ePub etc.