Allow production port to listen on to be specified in settings.

Simplest pull request ever!
Merge pull request #146 from jamalex/custom_port

Allow the production port (to listen on) to be specified in settings.
Session storage is required; CookieStorage has a bug (https://code.djangoproject.com/ticket/19387)
adding comment to be clear why the setting was added.
Merge pull request #147 from bcipolli/session_storage

Workaround for AJAX-based messages (use SessionStorage for django messages)
Merge remote-tracking branch 'upstream/develop' into moviecounts

Conflicts:
	kalite/settings.py
further cleanup of topic_tools algorithm to count movies.