3 - install into sitelib for Perl 5.12+
4 - use Tie::Handle to get Tie::StdHandle for older Perls
5 - avoid using fc() in v5.15.0 - v5.15.7
6 - fix tests for older Perls
10 - suppress stat() warnings on tied filehandles
14 - no longer requires stat() on filehandle
15 - tests use Test::More
16 - case folds with fc() on Perl 5.15+