Aux: Use .net 4.0 from now on
Feature-ish: Introduce unused new data handler code
Feature-ish: Add GetHandler() and this[] to DataHandlerDictionary
Codechange: Rename all 'Handler' related classes/namespace to corresponding 'Reader' name
Feature: Use new independent data handling infrastructure
Cleanup: Remove obsolete DataReceptionHandler.cs
Cleanup: Minor formatting improvement