added sorcery authentication, simple views, controllers

Karim did it all, I can't be held accountable.
You don't need these 4 lines, 

```ruby
+  get 'user_sessions/new'
 +
 +  get 'user_sessions/create'
 +
 +  get 'user_sessions/destroy'
 +
 +  get 'users/new'
```
because you already have 

```ruby
resources :user_sessions
```