More core provider Trace logging + splitting system.diagnostics out. MOAR!!!

- Sprinkled more TraceSource logging events through the remaining core providers.
- Extracted the system.diagnostics section into a seperate config file and referenced that in the sample MvcAuto web.config.
Updated version to 0.20.
Added a new 20.0-alpha NuGet pacakge for Core and Mvc dlls.