Refactored into View and Model and MandelbrotSet.  It works as before.  Did minor conversion to IntegerProperty and DoubleProperty but setup no binding or listeners.
I got Tasks working.

TODO:
1. The Mouse Drag to select region to zoom in on has stopped working so need to fix that.
2. The drag isn't showing "marching ants" and need to get that working.
3. Code refactoring to clean it up and make it "Clean Code".