Insert __END__ mark before POD

Signed-off-by: Gustavo L. de M. Chaves <gnustavo@cpan.org>
Convert HTML error messages into text before presenting them

Signed-off-by: Gustavo L. de M. Chaves <gnustavo@cpan.org>
v0.004

  [Changes]
  - Change the way Gerrit error messages are presented. In particular,
  HTML messages are converted into text before being presented.