Update HTTP-Tiny to CPAN version 0.033

Update HTTP-Tiny to CPAN version 0.033

  [DELTA]

0.033     2013-06-21 06:26:51 America/New_York

  [FIXED]

  - Modifying the 'agent' attribute with the accessor will append the
    default agent string, just like setting it during construction

0.032     2013-06-20 11:41:24 America/New_York

  [ADDED]

  - Added 'no_proxy' attribute, defaulting to $ENV{no_proxy}