second draft of iemgui handles--- still some bugs when switching between canvas gop rect and iemguis

made nbx scaling less wonky. It's still a bit wonky, but maybe that's just a function of the font resizing algo and the fact that width is constrained to character width

egregiously rough draft of g_numbox scaling-- need to work on the character-width x-scaling which is currently screwy

more predictable results.

added a flawed version scaling for g_mycanvas. (Flawed because cnv's rect is its handle, not the entire visible rectangle

If the GUI is unsuccessful in spawning Pd, use an alert message to tell the user and exit gracefully.

 *added legacy option for iemgui objects. Starting pd-l2ork with -lega…

…cy flag positions iemgui objects in their old, vertically inconsistent locations for the sake of retaining complete backwards compatibility.

*added sys_legacy global for inclusion of other potential legacy breakages that may develop later.

change alarm bell kludge used to separate messages to the GUI to a "unit separator" kludge. Still bad, but a little less bad

make key/keyup/keyname all suppress autorepeated events. We may need to revisit this later and possibly add a flag to toggle autorepeat in these objects