Refs #62 - Refactoring country_profile.js and new features

- Move logic to server side (see: edw.datacube). This allows us to
  memcache queries and reduces the number of AJAX calls to one;
- Cleanup scenario.js by moving all country profile related code to
  country_profile.js;
- Display only EU27 countries within country selection box. EU27 list
  can be found in config.py and is customizable via ZMI >
  portal_properties > scoreboard_properties > EU text/json property;
- Add BLACKLIST within config.py that is customizable via ZMI >
  portal_properties > scoreboard_properties > BLACKLIST text/json
  property and allows Site Administrators to filter indicators used by
  Country Profile Chart.