refactored password form field for it can be set from settings

added extra logic in decorated login to handle two_factor no redirecty login

added extra logic in decorated login to handle two_factor no redirecty login part 2

added extra logic in decorated login to handle two_factor no redirecty login part 3

removed extra changes
Merge pull request #100 from AJRenold/two_factor

PASSWORD_FORM_FIELD set from django settings file