ENH: Cleaned duplicate code in Manipulator classes tree; Moved ModelImageRegionChanged() connection.

     - Add Quicklook in MainWindow and connect its models

ENH: Linked updates of color-setup to update of color-dynamics. DOC: Improved class(es) documentation.

ENH: Linked color-setup widget to GUI; OPTIM: Minimized signals/slots emission which causes model updates and screen refreshed. DOC: Improved classes documentation.

ENH: Added mvdGui.h RgbBounds() and RgbaBounds() convenience functions; Added per channel reset method in ColorSetupController. DOC: Improved some class documentation.

ENH: Added ColorSetupController class (unlinked); BUG: Fixed QObject::connect() by QObject::disconnect() in disconnect method of controller.

ENH: for j2k products, m_Image can change when current lod changes, set it each time to use the right m_Image pointer

BUG (continued): HistogramModel::Percentile() returns [0; 1] (same as p of HistogramModel:Quantile(); ColorDynamicsController converts to percent.

ENH: Upgraded AbstractModelController reset mecanism for widget; Implemented reset to defaults buttons of ColorDynamicsController; Fixed widget initialization when setting a new model; Optimized number of signals emitted from widget/controller when initializing.

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.