Node selection and deletion now works.
Close editor on control destroyed
Create dim and highlighted colors
Default pens / brushes and better signals
Better auto-naming
Circles are now working
Use exception-throwing datum value lookups
Better stylesheets for disabled nodes
Adding Point2D object and control
Use Point2D control for circle's center
Only make node-control connections for top-level control
Only connect view changed events for top-level control
Adding rectangle node and control
Beginning IO connection UI
Sweet bezier curves (that don't do anything yet)
Drag rectangles properly
Switch to python3!
Working on drag-and-drop connections
Linking is starting to work
Use _control_type to make it clear that this is a class