Changed the interpretation of the -S option when the target is nominal from a fraction of the total population to a fraction of the total target value population. Also tidied up the code some.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10202 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Further code cleanup. Have not run any tests and have not tried to compile the packages either.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10203 e0a1b77d-ad91-4216-81b1-defd5f83fa92
DefaultListModels is not generic in Java 1.6. Cleaned up a further few classes.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10204 e0a1b77d-ad91-4216-81b1-defd5f83fa92