1.4:	Removed obsolete sum() function (hint from Guido Flohr)
	round() function is now dynamically generated,
	different code for 32bit and 64bit architechtures.
	Global 'use integer' (except for rotate_left()).
	Faster than 1.3.	

1.3:	Patch for the object interface from Gisle Aas.
	The module works as a fallback for Digest::MD5 now.
	Replaced 'use constant' with inline functions.
	
1.2:	Fixed a bug in the padding routine.
	Different sum routines, so Perl 5.6.0 works now.
	Using 'use integer'.
	
1.0:	Fix for big endian machines.
	Performancetuning.