country filter for location admin
Major models and database cleanup.

Models removed: 
Geopoint, 
ProjectGeopoint, 
ProjectGeographicfocus,
GeographicFocus, 
CurrencyDefExchangeDate, 
CurrencyExchangeRate, 
UicnCatalog.

Tables: 
ecofunds_uicn_catalog;
ecofunds_currency_exchange_rate;
ecofunds_currency_def_exchange_rate;
ecofunds_geopoints;
ecofunds_entity_geopoints;
ecofunds_entity_geographicfocus;
ecofunds_geographic_focus;
Merge branch 'feature/remove_unused_models'