Rewrote chapter 5
Added the code from chapter 5 to the repo
Minor corrections to chapter 6 - BBB

Corrected typos and minor rewording in chapter 6 - Backbone Boilerplate and Grunt-BBB.
Updated screenshots for chapter 5
Fixed link to download standalone Jasmine release
Merge pull request #321 from dcmaf/gh-pages

Chapter 6: BBB - Minor corrections and rewording
Merge pull request #323 from jeffjo/gh-pages

Chapters 2 & 3 corrections and clarifications
Merge pull request #325 from bschoenfeld/jasmine-download-link-correction

Fixed link to download standalone Jasmine release
Merge pull request #304 from wibblymat/exercise-2

Chapter 5 rewrite (#286)
minor changes, fresh build required after recent merges