#516 Finer-grained PyUnit Configuration

[Dustin C. Hatch]

It would be great to be able to configure PyUnit settings (i.e. test runner, test runner arguments) on a fine-grained scale than Workspace-global. Ideally, this would be possible on a per-project and per-run level, so that projects can override the workspace config, while runs can override all other configs. This would allow different combinations of test runner and arguments for different tests in the same project or workspace.

Specifically, I would like to be able to configure some of my tests to use Nose, while others use unittest. I would also like to be able to pass different arguments for different tests, such as `--with-pylons=test.ini` for some, but none for others.