              Format of the Choices file

Line 1 has 8 integers, mostly 0 for off, 1 for on:

 plotting method (0: wire to 7: user)
 shading (0 or 1)
 perspective (0 or 1)
 full sort (0 or 1)
 show circumcircle (0 or 1)
 show 3D description (0 or 1)
 show 3D tools window
 method of selection (0: Wenninger #, 1: Name, 2: Own Solid)

Line 2: light x,y,z direction cosines
Line 3: perspective value: (distance to screen)/(width of screen)
Line 4: rotation angle (degrees)
Line 5: three even integers giving the line widths (in OS units)
            of 3D solid, unselected and selected stellation lines
            (3D may be -2 for no lines)
        + three sets of four integers (<100) giving the lengths of
            the dashes for the 2nd, 3rd and 4th components;
            the four integers are the lengths of
            "on", "off", "on", "off" (in OS units)
Line 6: 3D window size (in OS units).
