Finished documenting the metrics. Eliminated the requirement to implement some methods in the SimilarityMetric abstract class
Finished documenting the metrics. Eliminated the requirement to implement some methods in the SimilarityMetric abstract class

samuelstjean/dipy,StongeEtienne/dipy,jyeatman/dipy,FrancoisRheaultUS/dipy,villalonreina/dipy,mdesco/dipy,demianw/dipy,rfdougherty/dipy,matthieudumont/dipy,rfdougherty/dipy,Messaoud-Boudjada/dipy,villalonreina/dipy,demianw/dipy,matthieudumont/dipy,jyeatman/dipy,oesteban/dipy,samuelstjean/dipy,sinkpoint/dipy,beni55/dipy,JohnGriffiths/dipy,JohnGriffiths/dipy,oesteban/dipy,nilgoyyou/dipy,FrancoisRheaultUS/dipy,mdesco/dipy,nilgoyyou/dipy,sinkpoint/dipy,beni55/dipy,samuelstjean/dipy,Messaoud-Boudjada/dipy,StongeEtienne/dipy