added tesst for Tokenizer and Search to get them under full coverage. relatex refactorings and coverage reports

added tests to get complete coverage of Transaction, RawSQL, AuditLog and Query/Having. Related refactorings. Added some getters to be able to test. Also added coverage report for these changes

refactored test harness and moved logic away from the run.php file. fixed coverage reporting so that it now generates a full html coverage files. look in tests/coverage/index.php in a browser for details