Rearreanged some templates.
home.html now inherits from base.html.
search_results.html inherits from home.html.
Namespaced the 'app' app with the name 'app'.
Named the URL patterns and replaced absolute links with url template tag.
Renamed tagslink.html to taglinks.html.
Named the 'api' app's homepage as 'api-home' and used that name with the url template tag in >base.html.
Proposed fix for #12.