Merge "Bringing HACKING.rst in correspondence with tox.ini"

Author: Jenkins

HACKING.rst

@@ -13,12 +13,14 @@ Horizon Style Commandments
     django.core.urlresolvers.reverse,
     django.core.urlresolvers.reverse_lazy,
     django.template.loader.render_to_string,
+    django.test.utils.override_settings,
     django.utils.datastructures.SortedDict,
     django.utils.encoding.force_text,
     django.utils.html.conditional_escape,
     django.utils.html.escape,
     django.utils.http.urlencode,
     django.utils.safestring.mark_safe,
+    django.utils.translation.npgettext_lazy,
     django.utils.translation.pgettext_lazy,
     django.utils.translation.ugettext_lazy,
     django.utils.translation.ungettext_lazy,