Fixed: last result passed to on_finish callbacks.
0.1.5
Fixed: wrong not_found message was being generated.
Changed design: jobs and rivers are no longer passed to .finish.
0.2.0
Added: error passed to callbacks for job errors.
Added: .reply_for
Fixed: .replys_for was using old design/arch.
Added: test for .replys_for(group, id)
Touchup.
0.2.1