Section 5.6.1: Further refactor static_pages_spec.rb by using shared examples
Section 5.6.2: Add tests to static_pages_spec.rb to check links
Section 6.1: Add User model
Section 6.2: Validation on User Model: name presence, length, email presence, format and uniqueness
Section 6.3: Adding secure password
Section 6.5: test for email downcase
Finish user signup
Add SSL in production