Log Message:
Update to 5.92

Upstream changes:
5.92  Sun Jun  1 00:15:44 MST 2014
	- fixed reserved-word clash when compiling with C++
		-- use 'classname' instead of 'class'
			-- ref. SHA.xs (rt.cpan.org #96090)
	- silenced MSC compiler warning about signed/unsigned comparison
		-- ref. SHA.xs (rt.cpan.org #95830)

5.91  Fri May 16 10:21:44 MST 2014
	- restored original 'addfile' for use on opened file handles
		-- allows callbacks in place of actual files
			-- ref. IO::Callback (rt.cpan.org #95643)
	- re-established inheritance from Digest::base
		-- to pick up future Digest enhancements automatically
	- cleaned up documentation

5.90  Wed May  7 07:57:08 MST 2014
	- consolidated all dynamic memory allocation into XSUBs
		-- streamlines referencing of SHA objects
		-- simplifies DESTROYing of objects
	- enhanced Makefile.PL to allow 'use warnings'
		-- automatically reverts to $^W for early Perls
	- scrubbed C and Perl code to remove all compiler warnings