Log Message:
Update to 1.8

Upstream changes:
*** 200?/??/?? Version 1.6

Fixed example output in doc in MD4.pm. Reported by jbwaters@gmail.com.

*** 2013/03/14 Version 1.7
Removed defunct code that caused incorrect error message when building on 64 bit \ 
platforms, patch by
zefram

*** 2013/03/14 Version 1.8
Fixed a test error in files.t. Corrected the comment to do with the reason in
verison 1.7