Add simple tests for admin views.

Make sure the admin views load without error. (Not really trying to test content right now.)

This includes failing test cases for:
* brack3t/Djrill#8: admin.autodiscover() fails without django-adminplus or DjrillAdminSite
* brack3t/Djrill#14: Django 1.5 doesn't support adminmedia template tag

djrill/test_admin_urls.py

@@ -0,0 +1,16 @@
+try:
+    from django.conf.urls import include, patterns, url
+except ImportError:
+    # Django 1.3
+    from django.conf.urls.defaults import include, patterns, url
+
+from django.contrib import admin
+
+from djrill import DjrillAdminSite
+
+admin.site = DjrillAdminSite()
+admin.autodiscover()
+
+urlpatterns = patterns('',
+    url(r'^admin/', include(admin.site.urls)),
+)