New

• Added Set.SubstituteFor<IFoo>().To<Foo>() syntax to NSubstitute version.
• Added new Subject property and GetSubject() method to access the class being tested.
• Deprecated the GetService() method (previously used to access the class being tested).

• Remove beta status

• Switch test framework to target .net 4 instead of 4.5

Initial beta release. Seeking feedback on:

• Namespaces - are they too long? Should each package have the same or different namespace?
• The name of the TestsFor base class.
• The flow of the Set.SubstituteFor<> syntax.