Add Candlestick chart to Qt Charts module

CandlestickSeries {
    id: candlestickSeries
    name: "Acme Ltd."
    increasingColor: "green"
    decreasingColor: "red"

    CandlestickSet { timestamp: 1435708800000; open: 6.90; high: 6.94; low: 5.99; close: 6.60 }
    CandlestickSet { timestamp: 1435795200000; open: 6.69; high: 6.69; low: 6.69; close: 6.69 }
    CandlestickSet { timestamp: 1436140800000; open: 4.85; high: 6.23; low: 4.85; close: 6.00 }
    CandlestickSet { timestamp: 1436227200000; open: 5.89; high: 6.15; low: 3.77; close: 5.69 }
    CandlestickSet { timestamp: 1436313600000; open: 4.64; high: 4.64; low: 2.54; close: 2.54 }
}

CandlestickSeries {
  id: candlestickSeries
  name: "BTC/USD exchange rates”

  HCandlestickModelMapper {
    model: btcusdModel // QAbstractItemModel derived implementation
    timestampColumn: 9
    openColumn: 4
    highColumn: 6
    lowColumn: 7
    closeColumn: 5
    firstSetRow: 0
    lastSetRow: 50
  }
}