Cleaned up DiceSimilarity and re-factored SimonWhite to use a tokenizer

I wanted to compare SimonWhite to DiceSimilarity because they are very similar but also subtly different. So I made some improvement to allow SimonWhite and DiceSimilarity to use the same tokenizer (important part of SimonWhite).

So I cleaned up DiceSimilarity and re-factored SimonWhite to use a tokenizer

Also moved the unit tests into the test folder (maven standard, tests will be run when doing an install) removed the test suites. They're not needed for anything. Test can be run by maven or by eclipse.

Had to fix a few tests by changing the expected values. Don't think these tests have been run often.