small changes on the example page (mostly comments)
small changes on the example page (mostly comments)

mattjmattj/drawingboard.js,Leimi/drawingboard.js,Leimi/drawingboard.js,zartata/drawingboard.js,zartata/drawingboard.js,zartata/drawingboard.js,mattjmattj/drawingboard.js,Leimi/drawingboard.js