Log Message:
Update to 0.84

Upstream changes:
0.84    Released at 2014-10-24.
        - Fixed some version conflicts.

0.83    Released at 2014-10-23.
        - Added method set_default_param.

0.82    Released at 2013-11-03.
        - Fixed the calls of _raise_error (RT #89989).

0.81    Released at 2013-11-01.
        - Added param utf-8 to Screen.pm and File.pm.

0.80    Released at 2013-10-04.
        - Fixed RT #89250 - dump() calls Dumper() now only if the log
          level is active.

0.79    Released at 2013-09-06.
        - Added option "category".

0.78    Released at 2013-05-16.
        - Fixed bug in validate->reload for default configs (RT #85346).

0.77    Released at 2013-05-15.
        - Just fixed Pod::Coverage testing in 002-pod-coverage.t.