Misc comment fix
Chapter 8: Modular Development - minor rewording/changes
Chapter 8: Modular Development - minor changes

Merged my corrections and rewording with latest.
Fix typo

once should be one
Small fixes for a link and reference to this.el.
Unit testing chapters (jasmine, qunit, sinonjs) - minor changes
Fix minor typos. 

Fixed example which references non existent model "todo" instead of "todo1".
Fixed minor typos.
Unit testing chapters (11-13)  - additional minor edits/corrections.
Removing superfluous files incorrectly added via a bad PR.
Merge pull request #353 from dcmaf/gh-pages

Chapter 8: Modular Development - Minor corrections / rewording
Merge pull request #363 from truk/gh-pages

Chapter 11: validation should check for "invalid" event
Merge pull request #351 from timhudson/gh-pages

Fix typo in chapter 6
Merge pull request #356 from samuelclay/gh-pages

Couple typos from book review
Merge pull request #345 from Florent2/gh-pages

Misc code comment fix
Merge pull request #360 from sgeralnik/gh-pages

Fixed first example in book. Fixed minor typos.