Qwt User's Guide 6.2.0

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- needle() : QwtDial
- normalized() : QwtInterval , QwtPointPolar
- num() : QwtArrowButton
- numButtons() : QwtCounter
- numColumns() : QwtDynGridLayout , QwtMatrixRasterData
- numRows() : QwtDynGridLayout , QwtMatrixRasterData
- numThornLevels() : QwtSimpleCompassRose
- numThorns() : QwtSimpleCompassRose
- numTurns() : QwtKnob
- QwtNullPaintDevice() : QwtNullPaintDevice
- QwtNullTransform() : QwtNullTransform