nanshe/expanded_numpy.py: Added the pair_dot_product function for when a dot product is needed between a matrix and itself.
nanshe/expanded_numpy.py: Added the function pair_dot_product_partially_normalized for calculating dot_product_partially_normalized between vectors from the same set.
nanshe/expanded_numpy.py: Added the function pair_dot_product_normalized for calculating dot_product_normalized between vectors in the same set.