Lbudginas/#493 hive price chart
- Add HIVE price history chart to main page using https://developers.hive.io/apidefinitions/#market_history_api.get_market_history API
- Average daily price of HIVE was calculated by taking hive and non_hive volume into equation instead of close price, because it should give more accurate average price.
- Price is shown for last 30 days with interval of 1 day or 86400 seconds from current time.
- Min and Max values are calculated in a period of 30 days.