reduce redundant filter & without syntax
Cache $todoList and improve readability
Merge pull request #934 from pgilad/patch-1

reduce redundant filter & without syntax
backbone+rjs - code style
Merge pull request #935 from pgilad/patch-2

Cache $todoList and improve readability
reduce redundant filter & without syntax
reduce redundant filter & without syntax
Merge pull request #937 from pgilad/patch-3

reduce redundant filter & without syntax
Merge pull request #938 from pgilad/patch-4

reduce redundant filter & without syntax
various code style twerks
improve collection flow in backbone examples