Merged old Box code with new Widget (untested)
Merge branch 'scenegraph_reorganization' into grid_widget
Widget updated to include margin, padding, border drawing, and child widget management
Merge branch 'master' into grid_widget
minor fixes
Moving toward having canvas manage fbo / viewport and associated transforms
Canvas now keeps track of fb_ and ndc_transforms
viewbox1 example runs
Corrections for viewport setting in viewbox
viewbox works with glviewport clipping.
viewbox + fbo is almost working.
viewbox + fbo working again.
Merge branch 'grid_widget' into canvas_visual_transforms
Grid widget is working again
docstrings for examples.
Vaccuum old code
Move transform methods to SceneCanvas
Remove commented code
Correct FBO handling
Minor edit - comment correction
flakify, demo transforms in grid example