moved django into plugins, moved djtest into its own file

django/django.load → plugins/django/djtest.fish

 # time, cleanup pyc and running test, settings as first argument
 # e.g. djtest settings_dev
 function djtest
-    if test -n $argv
-        set SETTINGS = $argv[0]
-    else
-        set SETTINGS = false
-    end
+  set VERBOSE --verbosity=1
+  find . -name "*.pyc" -delete
+
+  if set -q argv
+    time python manage.py test $VERBOSE --settings=$argv
+  else
+    time python manage.py test $VERBOSE
+  end
 
-    set VERBOSE --verbosity=1
-    find . -name "*.pyc" -delete
-    time python manage.py test $VERBOSE --settings=$SETTINGS
 end