Add method MapviewsUsageMetrics#get_date_range
Add method MapviewsUsageMetrics#get_date_range

splashblot/dronedb,splashblot/dronedb,CartoDB/cartodb,CartoDB/cartodb,CartoDB/cartodb,splashblot/dronedb,splashblot/dronedb,CartoDB/cartodb,CartoDB/cartodb,splashblot/dronedb