1.5: Don't rely on (1 << 32) being 1 on 32 bit machines.
Get rid of ``no integer'' pragma and inline rotate left
function.
Version 1.5 outperforms version 1.4 approximately by
factor 2.
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.