Wire the classifier to use the new compiler implementation

Also enable unit tests, and clean up some old test files
i'm not a fan of how these look.  Contrast this to the declarative form in the roslyn tests.  There's no need to index, or deal with tuples or lengths.  You simple state the input and what you expect the set of outputs to be.

        public void VarAsUsingAliasForNamespace()
        {
            Test(@"using var = System;",
                Keyword("using"),
                Identifier("var"),
                Operator("="),
                Identifier("System"),
                Punctuation(";"));
        }