Log Message:
Update 2.01 to 2.21
-------------------
2.20  Tue Mar 29 11:51:38 CDT 2011
        - Fixed tests to avoid failures, upgrade tests to Test::More
          (courtesy Mark A. Stratman <stratman@gmail.com>)
        - Remove conditional support for GIF/PNG as all new versions
          since 2004 of GD should support both

2.21  Mon Sep 24 12:10:29 PDT 2012
        - Redesign tests to use Test::More and to be more tolerant of
          how different versions of GD encode images
          (thanks to Lukas Mueller <lam87@cornell.edu>)
        - Add PREREQ_PM to Makefile.PL