cluster type as binding source\target

[lsoft]

disallow to the any cluster type to be a source\target for binding clauses.

e.g. do not allow following:

public partial class Cluster0 : DefaultCluster {...}

public partial class Cluster1 : DefaultCluster
{
    [DpdtBindingMethod]
    public void BindMethod0()
    {
         Bind<Cluster0>().To<Cluster0>()...;
    }
}