Log Message:
Update to 0.22

Upstream changes:
0.22  Sun Jun  1 00:15:46 MST 2014
	- fixed reserved-word clash when compiling with C++
		-- use 'classname' instead of 'class'
			-- ref. SHA3.xs (rt.cpan.org #96090)

0.21  Fri May 16 10:21:46 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

0.20  Wed May  7 07:57:10 MST 2014
	- consolidated all dynamic memory allocation into XSUBs
		-- streamlines referencing of SHA3 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