Reorganize some files in the `subliminal-instrument` Project Navigator.
Make the "s" optional when parsing "executed … tests". (fixes #192)

This caused #192 because we properly parsed the beginning of the message
("Testing finished"), but not the end, and so didn't grab the test numbers.
Merge pull request #193 from inkling/jeff/fix_testing_finished_parsing

Fix the parsing of "testing finished" in CI.