Kepler and issues with actor compilation (import org.apache.commons.cli.*;)

If you are getting following error during compilation of Kepler

error: package org.apache.commons.cli does not exist
  [compile] import org.apache.commons.cli.*;

It means that you are using outdated Kepler release. New developments (and refactoring) required some changes in library set for Kepler. Unfortunately, it's not possible to keep full backward compatibility (one library must be updated).

This may lead to errors while building actors using most recent FC2K release. In order to work without any issues, you have to make sure to use proper version of Kepler