These names are horrible:
	> > * an added method  #divideSecureBy: (required six divisions)
	> > * an added method #divideFastAndSecureBy: (requires only three 
	  (1 + 0 i) secureDivisionBy: <arg>

Why not #securelyDividedBy?  And why would anyone want insecure division
as a default?  Nobody who knows anything about complex division expects it
to be particularly fast; you can plan your way around that.  But you do
expect it to work when it can.