start write unit test
restore user admin
replace user admin in demo app. not permit to change users.
disable copy_registry for fast startup, will find nice way to deal with the problem
group permission field widget use m2m_transfer.
add sites.py tests

Conflicts:
	exadmin/tests/__init__.py
add model testing file
add batch change models data feature, not finish.
add ModelFormUtilView init_request default arg
change ``model_admin_urlname`` to ``model_admin_url`` and ``admin_urlname`` to ``get_admin_url``
unprint add view permission info.
remove popup
change ``admin_class`` to ``option_class``
exadmin.views import More View Classes, and add ``__all__`` attr.
add model admin view context.
organize views code imports.
templates use new context var and add delete btn into detail page.
upgrade bootstrap to 2.3
fix navbar input-append and input-prepend margin
add change password feature.