Merge pull request #1 from ulthuan/master

Change followers template. Thanks you!
Fix pull request #1
Adding Pitble model
First version of followers view
Adding Pitble manager
Fix the class problem. Now you can add an user from admin site
add sing-in template and sing-in view
First version of the sign in form
First version of sign in form (now worksgit status)
Finishing the login view
Improving user model admin
Adding context_processor example
Middleware example
Middleware example
Remove middleware and template context pocessor example
Adding the views