DiffFilterFunction added
OverlayFilterWidget added
restructured DualFilterView to fit latest interfaces
Merge branch 'master' of github.com:CVVisualPSETeam/CVVisual
signFilterSettingsChanged is now private
Merge branch 'master' of github.com:CVVisualPSETeam/CVVisual
Merge branch 'master' of github.com:CVVisualPSETeam/CVVisual