add test_results verb

@wjwwood @tfoote Please review.
The abspath can stay if you're worried about a corner case, but I think the use of os.getcwd() is superior over os.curdir

Either way does work, but it's cleaner to always have cwd's value be a full path using os.getcwd() instead of either being a full path or '.' , implicitly relying on the later abspath in the following statements to expand it before extending the basepath variable. It's not functionally different but is less brittle for potential future changes where the cwd variable is reused later in the context, and not explicitly known to the developer that it could be either a full path or a partial one.