Terminating classifications will occur any time there is actual data
validation, since we're passing no data at all.
* progtest/src/env.js (common): Pass argument to program#rater to suppress
terminating classifications.
Performance hit is too great; automated tests need to be _fast_!
* src/AsyncTestRunner.js: New TestRunner subtype.
* src/TestRunner.js (_runAsync): Rename to virtual protected
`runAllTests'; this method is overridden by aforementioned subtype.
* src/env.js: Use it.
Mike Gerwitz