replaced null with 'state' in SynchronizationContext.Post within WordCloudViewModelTests
Moved EnumerateInstalledFonts() from OptionsViewModel to StaticHelpers.
Found a pretty significant problem in VS Test Explorer - I was using a SynchronizationObject to try to execute control involving certain objects (Fonts.Typefaces, TextBlock [for the purpose of measuring the render size of text, SolidColorBrush), which apparently failed without aborting the test. Each test passed, even though it essentially executed no code. So, I've spent hours looking and I can't find any way at all to run test code that involves UI elements at all, even if you're not really *modifying* the UI or drawing anything. Deployment.Current.Dispatcher causes a fatal DLL not found exception. So, I'm electing not to test FontObject.GetWordSize() and I'm going to later implement an IValueConverter to convert WordModel.Color into a SolidColorBrush.