ENH: support creation of Monteverdi2 windows NSIS installer. Preliminary import of MacOS bundle support file (untested)

ENH: implement the quicklook virtual_buildModel : write the ql to disk if multi-res or shrink the input image if not

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.