WIP: Add initial result collector
Add standard verbosity result handler
Fix calling wrong method
Put test count and count of tests run on result handlers
Move get_test_description to result handler
Add verbose test result habdler
Move result handlers into plugins package
Add interface class for result handler plugins
Fir result handler creation
Hook result handlers into the application
Fix help string
Simplify handling of verbosty actions
Fix tests
Add more abstract methods for result handler plugins
Add equality operator for TestResult
WIP: Update tests for test_result
Update tests
Add tests for pre-end-of-test behaviour of quiet test result handler
Replace testfixtures.OutputCapture with simpler solution that works
Add tests