all non binary tree structs are gone (almost all)
Use names from https://en.wikipedia.org/wiki/Graphical_widget
toolkit andlabs/ui is isolated from being accessable
all direct references to andlabs are removed
working dropdown widgets
add debugging more buttons and windows
* add a example cmds/consolemouse
uses a console button to launch the andlabs/ui
* fix wrong return value in toolkit/NewLabel()
* redirect STDIN output to a file
* wonderful fix of Window() exit
* finally remove the ancient stupid variables x & y
* phase out struct 'box' and use 'node' instead
* better names for things: use NewFoo() and NewBar()
Jeff Carr