add lumbar chapter
 _ Fix for first three issues noticed.
Update index.md
Correct reference to underscore.js
Bad description of what happens when adding an item to ToDo list
Minor edits
Update getByCid example

Checking `todoCid` instead of `todo2` against `myTodo` makes more sense in this context.
Replace galleryApp with todoApp
Merge branch 'gh-pages' of github-beastridge:addyosmani/backbone-fundamentals into gh-pages

Conflicts:
	index.md
Add thorax chapter
Remove TODO note
Remove merge conflict comment
Remove a tag from title
Fix underscore template syntax
fixes backbone.paginator project url
Merge pull request #229 from madflo/patch-1

fixes backbone.paginator project url
Merge pull request #228 from zhengjia/gh-pages

Fix underscore template syntax
Merge pull request #221 from jreyes33/gh-pages

Minor code examples fixes
Merge pull request #220 from theyak/gh-pages

Some initial updates
Tidy comments