Move page titles to YAML
Change user model
Update routes for users and sessions
Modify sessions controller
Make new controllers for users and mailers for users and sessions
Add return path
Add timeout to protect email from time attack forgery
Add reCAPTCHA
Add views for email and password editing
Add views for sessions and users, except for users index
Add view for users index
Add upper navigation with user menu items
Change error messages after user validation
Correct definition of ruby|rails classes' extension