``dashboard_views.add_route()`` first adding ajax, than -- other routes
renamed ``FETCH_DATA_MEMCACHE_NS`` to ``FETCH_DATA_BY_URL_MEMCACHE_NS``
``cached_fetch``: more strict params for ``urlfetch.fetch()``
``cached_fetch()`` fixed bug: invalid caching fails
added ``sh_views``
``dashboard_views.get_news_url_info_ajax()`` -- more stronger