ENH: Enhanced VectorImage::virtual_BuildModel() to initialize default-display and default color-dynamics settings; Made Abstract classes constructors protected.

ENH: Upgraded AbstractModelController to disable/enable  controller widget when there is (no) model.

ENH: Added Set/Get Low/High quantile on ColorBandDynamicsWidget; Refresh intensity/quantile when quantile/intensity has changed in ColorDynamicsController.

ENH: Added HistogramModel::Percentile() to compute quantile percentage given intensity; Changed granularity of histogram (5x oversampling 256 RGBA values); Added mvdMath.h/.cxx to group math formulas (such as linear interpolation (lerp).

REFAC: Removed dereferencing using weak pointers (call to SmartPointer<>::GetPointer()) in VectorImageModel::ToImage().

ENH: Upgraded AbstractController to catch widget and model QObject::destroyed() slot; Added AbstractImageModel::GetHistogramModel() accessors; Added SetGet Low/High/Min/Max intensities Q_PROPERTY on ColorBandDynamicsWidget; Initialized ColorDynamicsController intensity values (based on HistogramModel) when File/Load.

      - widget size are passed as parameter of LoadFile to do this
     * Add a GetImageLargestPossileRegion that compute the largest region
       of the resolution 0
     * Add helper method that compute the best resolution following a zoom
       factor and add the &res paramater to the filename

ENH: Added ColorDynamicsController; Moved SIGNALS/SLOTS from VectorImageModel to ColorDynamicsController; Connected ColorDynamicsController to MainWindow when selected-mode is about to/has change.