added kullback leibler for gaussian cases

math/distribution/Normal.h

@@ -44,6 +44,15 @@ namespace Distribution {
 			gen.seed(seed);
 		}
 
+        /** get the mean value */
+        const T getMu() {
+            return this->mu;
+        }
+
+        /** get the standard deviation */
+        const T getSigma() {
+            return this->sigma;
+        }
 
 		/** get the probability for the given value */
 		static T getProbability(const T mu, const T sigma, const T val) {