edit
add authorization to edit and create
user authorization
friendly forwarding
add users page
refactor static_pages_spec (Ex5.6.1)
add test to static_pages_spec(Ex5.6.2)
add application_helper_spec and refactor utilities
add email with mixed case test(Ex6.5.1)
refactor user(Ex6.5.2)
fix valid email regex(Ex6.5.3)
let gravatar size be changed(Ex7.6.1)