Initial import

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10076 e0a1b77d-ad91-4216-81b1-defd5f83fa92
The constructor that takes a Throwable as an argument was not setting the message - fixed.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10077 e0a1b77d-ad91-4216-81b1-defd5f83fa92