What's the best way to attract a pile of threatening lawyers' letters from Microsoft? Sell pirate copies of Windows? Write a DRM-busting program? Londoner Jamie Cansdale has just discovered a new approach. He had the temerity to make Redmond's software better. As a hobby, Cansdale developed an add-on for Microsoft Visual Studio. TestDriven.NET allows unit test suites to be run directly from within