#52 Reflect test progress in addin when debugging

[Manfred Lange]

Debugging a test via csUnit's addin in VS launches the commandline. The addin's controls are unaffected by the test progress.

Expected behavior: As with the standard test execution (non-debugging) the test progress should be shown in the progress bar, etc.

To enable this the command line needs to communicate with the addin, e.g. set it up as an additional test listener.