Monoid

NEWS:
Added sparse Binomial, csr_fbinomial, csc_fbinomial, csr_dbinomial, csc_dbinomial,
Moved out of sparse sandbox:
SpSum, sp_sum, ColScaleCSC, RowScaleCSC, col_scale, row_scale, Diag, diag, SquareDiagonal, square_diagonal, EnsureSortedIndices, ensure_sorted_indices, clean)
added sparse.sqrt,sqr,log1p,floor,ceil,sgn,round_half_to_even,arctanh,tanh,arcsinh,sinh,arctan,arcsin,tan,sin}