v0.0.16

Improve

• Add Gasser–Müller kernel estimator
• Add predict function in hierarch clustering methods
• Add weighted least squares
• Add block function of Matrix class

Breaking change

• Make null as unlabeled data of semi-supervised learning models
• Change slice and remove sliceRow and sliceCol function of Matrix class
• Change property name of Affinity propagation
• predict function returns 1 or -1 of some binary classification models