Change SimpleJson to be a static class
Change SimpleJson to be a static class

The class has no instance members, thus it should be a static class.
SimpleJson's README lists .NET 2.0 as the minimal supported version. 
Static classes are supported in C# 2.
jasonmead/simple-json,facebook-csharp-sdk/simple-json,ndevenish/simple-json,suaff/simple-json,facebook-csharp-sdk/simple-json,suaff/simple-json,suaff/simple-json,jasonmead/simple-json,jasonmead/simple-json,facebook-csharp-sdk/simple-json,ndevenish/simple-json,ndevenish/simple-json