Hopefully fix UTF-8 chars in Hipchat notification messages

Dependencies

• [2] NB2VOKIR Include names of committers in HipChat notifications
• [3] JAH3UPWA Support revision control systems via plugins
• [4] 3BTJRSU3 GitInput.pm: Don't do a chdir to the Git clone

Change contents

• edit in src/lib/Hydra/Plugin/GitInput.pm at line 9
  [3.5040]

  [3.5040]
  + use Encode;
• replacement in src/lib/Hydra/Plugin/GitInput.pm at line 166
  [2.1835]→[2.1835:1918](∅→∅)
  − push @$res, { revision => $revision, author => $author, email => $email };
  [2.1835]

  [2.1918]
  + push @$res, { revision => $revision, author => decode("utf-8", $author), email => $email };