Initial subpackage reorganization
fixing imports
got cube example working
Move visuals.entity back to scene
Rename entity=>node throughout
Docstring updates
Suffixed all visual classes with "Visual"
fixes
Add TransformSystem class
Add visual wrappers to scene package
Make Node a subclass of Visual
TransformSystem updates, visuals now use tr_sys.get_full_transform()
Visual.draw() now takes transform system argument
Bugfixes
docstring update
Fix cube example
Query canvas for dpi
fix dpi lookup in canvas
Scene events now subclass from TransformSystem
Cleanup and create visualnode subclasses