Log Message:
Update to 0.22

Upstream changes:
0.22      2013-03-27 15:50:29 America/New_York

  Documented:

  - Issue tracker is now github

0.21      2012-11-14 19:04:49 America/New_York

  Changed:

  - Skips tee and leak tests for closed STDIN on Perl prior to
    5.12 when PERL_UNICODE=D.  Documented lack of support as
    a known issue.

  - Isolated tee subprocesses from effects of PERL_UNICODE as a
    precaution (though this did not fix the above issue).

  - Improved layer detection for handles proxied due to being closed
    or tied.