Merge pull request #13 from fireweb/master

added railscast 417 
Fixed #5
finished foundation demo
update the readme
Merge pull request #14 from xiongbo/master

Finished 416 #8
add readme
init and add foundation
add readme
modify the layout
add footer
modify the interface of products
finish
added before change for 416 episode
Merge branch 'master' of github.com:hlee/railscasts
started working 416 refact
add refactor before and update readme
add railscast416
Merge pull request #15 from zlx/feature/railscast416

Complete RailsCast416
william: add railscasts 417
Merge pull request #16 from williamherry/master

william: add railscasts 417
add view_models for signup and password