Changes.md : Update for recent Display/ImageGadget improvements
Changes.md : Update for recent Display/ImageGadget improvements

hradec/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,ImageEngine/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,andrewkaufman/gaffer,hradec/gaffer,hradec/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,hradec/gaffer,hradec/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer