+ .pcd
+ new/save/open
+ edit menu
+ cancel on esc
+ cancel on draw mode change
* onExit: sys.exit(0), frmmain.close glucks
+ pt2mm,mm2pt
+ drawing & file save/load works !!! no snap and constrains yet :(

Signed-off-by: Dmitry Ponyatov <dponyatov@gmail.com>