Revision history for Perl extension Devel::OptreeDiff.

0.01  Mon Jun 28 20:53:01 2004
    - original version; created by h2xs 1.23 with options
	    -X -n Devel::OptreeDiff
0.02  same day
    - added tests and caveats
    - added fmt_optree_diff to the export list
2.0   Tue Dec 25 01:12:13 2007 -0800
    - apparently a lot of things
2.1   Sun Mar 20 11:41:09 2011 -0700
    - Fix tests for threaded perl