19990809
	version: Zmodexp 0.50, alpha.
19990811
	api: exponent is now stored in bytes, not words.
	api: now doing FPU control-word change only in init.
	api: zmodexp512() now uses pointer to zmodexp512_tmp.
	ui: added 512-bit line to speed.
	internal: checked for SIGILL in tryrdtsc.c.
	internal: miscellaneous changes.
	opt: better scheduling for Pentium and Pentium MMX. also helps PII.
	version: Zmodexp 0.51, alpha.
