'Adds the scopes to this authorization.
.. versionadded:: 1.0
:param list scopes: Adds these scopes to the ones present on this
authorization
:param str note: (optional), Note about the authorization
:param str note_url: (optional), URL to link to when the user views
the authorization
:returns: True if successful, False otherwise
:rtype: bool'

@requires_basic_auth
def add_scopes(self, scopes, note=None, note_url=None):

    return self._update({u'add_scopes': scopes}, note, note_url)
