Login with third party

[EricNguyen123]

estimate task ( in hours ) : 28 hours Issue:+ login for google

• login for facebook
• login for github
• write Rspec for login function
• fix authentication error db change: add column provider, uid to users

[EricNguyen123]

estimate task ( in hours ) : 28 hours Issue new: +login for facebook +login for github +write Rspec for login function