Add app to store and view the PostgreSQL Weekly News, including generation

of the RSS feed. (Which will receive a new URL now that it lives in the
actual app and not in with the static files, so a redirect will be needed
there).

pgweb/settings.py

@@ -105,6 +105,7 @@ INSTALLED_APPS = [
     'pgweb.survey',
     'pgweb.misc',
     'pgweb.featurematrix',
+	'pgweb.pwn',
 ]