Fixed:
 - DoesNotExist at /organization/save/
 - RegistrationError at /employee/save/ <class 'gestorpsi.person.models.Person'> has not been registered with django-reversion
 - /user/save/ create_inactive_user() takes at least 5 arguments (4 given)
 - Updated to django-registration version 0.8

SQL Changes:

 - Droped person_id field from organization_professionalresponsible

 ALTER TABLE organization_professionalresponsible DROP INDEX person_id;
 ALTER TABLE `organization_professionalresponsible` DROP `person_id`;

 If you have trouble to drop it, please read the 2nd comment:
 http://stackoverflow.com/questions/160233/what-does-mysql-error-1025-hy000-error-on-rename-of-foo-errorno-150-me

Note: you MUST to have at least one Site registered