Fixed a bug where correlation/covariance was not correct in the case where missing values are ignored (i.e. only co-occurrences considered)

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10082 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Fixed a bug where correlation/covariance was not correct in the case where missing values are ignored (i.e. only co-occurrences considered). Also fixed another bug where the model output by the classifier job in the Knowledge Flow did not have the class index set for its training data header

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10083 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Was treating white space only entries as nominal values rather than missing - fixed.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10084 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Was treating white space only entries as nominal values rather than missing - fixed.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10085 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Was treating white space only entries as nominal values rather than missing - fixed.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10086 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Updated to take into account a small API change

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10087 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Javadoc fix.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10088 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Javadoc fix.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10089 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Javadoc fix.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10090 e0a1b77d-ad91-4216-81b1-defd5f83fa92