Add Documentation badge in README.rst

Courtesy of readthedocs.org
Unit test for unracked equipment in hwdoc views

Add a unit test for viewing an unracked equipment. This fails right now
due to a bug. refs #69, #71
Better locale and internationalization

Django 1.4 and above supports L10N and timezones. Add them to
settings.py.dist
Fix a bug with permissions in admin views

Turns out the order of the permission checking was wrong and a superuser
would not have full access. Fix this by reversing permission checking.
The regression was introduced in ce5292fe
ldapBackend.py: Do user.save() after user-create's add-group

* When a user doesn't exist and needs to be populated from ldap, the
  user.save() is located inside the conditional code for setting
  LDAP_AUTH_GROUP. This commit moves it after that so the save() always
  happens (even if LDAP_AUTH_GROUP is set in settings.py it might bork
  before the save() if the group doesn't exist).

* Also moved it and the user.is_active assignment to after the
  "user-exists" try-except block, to be more DRY