Include ObjectModel reference under any development setup
Create TestHelper to mark helper methods in test assembly
Treat all methods as test cases unless they're marked [JerobaTestHelper] or they're in a class marked [JerobaTestHelper]
Remove JerobaTestHelper -- we will assume everything is a test unless specifically marked as a helper, or if it's reserved.
Create internal mocks for default parameters in TestDiscoverer
Separate test processing from discovery method
Implement executor