(picture-draw-rectangle): New command.
(picture-mode-map): Add binding for picture-draw-rectangle.
(picture-mode): Doc fix.
(picture-rectangle-ctl): New variable.
(picture-rectangle-ctr): New variable.
(picture-rectangle-cbr): New variable.
(picture-rectangle-cbl): New variable.
(picture-rectangle-v): New variable.
(picture-rectangle-h): New variable.
(move-to-column-force): Function deleted;
calls changed to use move-to-column.
(picture-insert): New function.
(picture-self-insert): Use picture-insert.
(picture-current-line): New function.