use svg background-image for box instead of box-shadow. The left side of the box-shadow was 2-pixels wide, so this should look better

remove old file. Started developing with a test version called 'pd_canvas.html', and eventually forgot about original

got a rudimentary hack for showing msg box while editing
use outline instead of border for object box border

started working on port of [draw image]

document a bug for unit-circle.pd in todo