Initial commit of v2.1 with .NET 4.5 / refactorings

Now ported to github, Web Service Studio (v2.1) is now upgraded for
framework 4.5.1 / VS.NET 2013. Future enhancements /wishlist includes
the support for Nullable Types, WCF REST style API, UI improvement,
Client certificate support, and to allow a complete composite type
testing.