title: EF Database First with TPT Inheritance only creates DbSet<T> for base clases
body: <p>I have an EF6.1 EDMX (Database First) model and I am using TPT inheritance for several types (ie. Employee : Person), however, in the generated <code>Model.Context.cs</code> class I only have <code>DbSet&lt;T&gt;</code> classes for my base types and not the inheriting ones. Is there anything that needs to (or can) be done to either the EDMX model or the T4 templates to generate <code>DbSet&lt;T&gt;</code> for the inheriting classes as well?</p>