Add check for unit test framework.
Link against boost UTF
Wrap CppUnit main
Add boost wrappers for CppUnit assertion_traits
Convert grammar_tests
Convert literal tests to Boost UTF
Convert misc. tests to Boost UTF
Convert non_terminal tests to Boost UTF
Convert production tests to Boost UTF
Convert sequence tests to Boost UTF
Convert YAML tests to Boost UTF
Remove remaining references to CppUnit
Merge branch 'boost_utf'