Configurable authorization page in AuthorizationView

[DavidMuller]

This pull request adds the attribute skip_authorization_completely to the AuthorizationView class. skip_authorization_completely defaults to False. However, if skip_authorization_completely is True, the authorization page is skipped and a token is immediately granted/returned.

For example the following url would always skip the authorization page whenever granting tokens to users:

url(r'^o/authorize_skip_authorization_page/$', AuthorizationView.as_view(skip_authorization_completely=True), name="no_authorization_page"),

This PR includes a new test in test_implicit.py for this behavior.

[coveralls]

Coverage increased (+0.01%) when pulling c9ee4a1 on DavidMuller:configurable_authorization_page_implicit_grant into 5ed4f50 on evonove:master.

[AduchiMergen]

👍 please merge this

[masci]

Moved the skip_authorization flag to Application model, your code was merged