More option handling cleanup and elimination of warnings.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10169 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Updated for minor changes

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10170 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Updated for minor changes

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10171 e0a1b77d-ad91-4216-81b1-defd5f83fa92