Fixed assertion logic in concurrent execution test (on windows, the start times resolved to the same instant).
Using convey.Printf for debugging of shell tests.
Commented out failing shell tests (for now).
Needed to use os.PathSeparator in the tests too (duh!).
Fixed remaining failing tests (but need to prettify the watcher tests).
Fixed watcher tests using the normalize function.
Correctly handling windows paths when resolving the current runner. All tests pass in Windows (Fixes #181).