Simplified SceneInspector.Diff into an abstract base class.
Simplified SceneInspector.Diff into an abstract base class.

All the functionality for side-by-side diffs in frames is moved into the SideBySideDiff class. This allows more flexible subclassing of Diff.

johnhaddon/gaffer,boberfly/gaffer,ImageEngine/gaffer,lucienfostier/gaffer,cedriclaunay/gaffer,boberfly/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,ivanimanishi/gaffer,chippey/gaffer,johnhaddon/gaffer,cedriclaunay/gaffer,lucienfostier/gaffer,andrewkaufman/gaffer,chippey/gaffer,cedriclaunay/gaffer,johnhaddon/gaffer,hradec/gaffer,ivanimanishi/gaffer,andrewkaufman/gaffer,hradec/gaffer,boberfly/gaffer,cedriclaunay/gaffer,chippey/gaffer,ImageEngine/gaffer,GafferHQ/gaffer,goddardl/gaffer,johnhaddon/gaffer,hradec/gaffer,goddardl/gaffer,goddardl/gaffer,appleseedhq/gaffer,lucienfostier/gaffer,andrewkaufman/gaffer,chippey/gaffer,boberfly/gaffer,ivanimanishi/gaffer,ImageEngine/gaffer,ivanimanishi/gaffer,GafferHQ/gaffer,hradec/gaffer,appleseedhq/gaffer,ImageEngine/gaffer,hradec/gaffer,appleseedhq/gaffer,goddardl/gaffer,johnhaddon/gaffer,appleseedhq/gaffer,GafferHQ/gaffer,lucienfostier/gaffer,GafferHQ/gaffer,andrewkaufman/gaffer