Add only and except parameters to acts_as_authentication_handler_for

Add only and except parameters to acts_as_authentication_handler_for

Example of usage:
```ruby
# Only specified actions
acts_as_token_authentication_handler_for User, only: [:actions, :with, :token, :auth]
# All actions except specified actions
acts_as_token_authentication_handler_for User, except: [:actions, :without, :token, :auth]
# Manual mode
acts_as_token_authentication_handler_for User, only: :none
before_filter :authenticate_entity_from_token!, only: [:actions, :with, :token, :auth]
```