Complete remaining code cleanup

[stuarta0]

After master checkout on a clean OS there are a few remaining code maintenance tasks to complete:

• Remove the SQLite.Interop.dll files. These should be handled by NuGet.
• Replace Standalone field output with PathFactory.GetFields(SelectedSubject) until Implement user-definable outputs #5 is complete.
• Update README to outline getting started process:
  1. Restoring NuGet packages
  2. Make the Standalone project the startup project
  3. Add an example XML configuration file, SQLite database and use that as the Standalone command line argument
• Update README to indicate no external libraries are needed (except for Standalone).