Removed tests for positivity of differential entropy (because it is not in general true!), fixed Wishart entropy and KL to be defined in terms of common helper functions (at some cost of computational efficiency) and rewrote Normal-Wishart entropy and KL in correct form (previous naive version was incorrect).
Removed tests for positivity of differential entropy (because it is not in general true!), fixed Wishart entropy and KL to be defined in terms of common helper functions (at some cost of computational efficiency) and rewrote Normal-Wishart entropy and KL in correct form (previous naive version was incorrect).