Make the transition system more generic and robust

hiboo/application/__init__.py

hiboo/application/base.py

hiboo/application/social.py

hiboo/models.py

hiboo/profile/common.py

hiboo/profile/templates/profile_details.html

hiboo/profile/templates/profile_list.html

hiboo/profile/transition.py

hiboo/profile/views.py

hiboo/templates/macros.html