Added language suffix when loading flatblocks.
Cleaned up news app so it is dedicated to news.

Previously the news app implemented extra features such as snippets
(flatbocks) that displayed commentary about the observations being
displayed as well as things like species added to the yearlist.
That meant the app was effectively implementing the home page for
the site and therefore difficult to separate out all the different
pieces of functionality and neew features added more dependencies
to other apps. That is really the function of the home page - which
will now subclass the NewsView and aggregate features from other
apps. That still means the home view has all the dependencies of the
old news view but the overall structure of the site and how the apps
are implemented is much cleaner.
Added home page overriding news app to add extra content.
Added an app for displaying photos.

Downgraded the version of jQuery used from 1.11.0 to 1.7.1 so the
slimbox2 jQuery plugin would work correctly.
Added an app for displaying yearlist additions.
Added django-reversion to track data changes.
Settings for optional features are now available in the template context.
Added a basic app for embedded subscriptions to mailchimp mailing lists.
Merged news, locations, photos and yearlist app together.

Previously the news, locations, photos and yearlist apps were used
to separate out different pieces of functionality which were then
integrated on the home page of the honeyguide site. The general
idea was that new features could be added to apps and the overall
complexity of the individual apps would be kept low. However in
practice it is not particularly easy to separate all functionality
particularly when javascript, stylesheets, language strings etc.
are shared at least in some capacity.

The decision to merge most of the apps (the mailinglists app is
kept separate as it is likely to be reusable for other projects)
was made since the project is essentially feature complete at
least for the forseeable future and the honeyguide app was not
too bloated as a result.