Constructor from a dense matrix

[giordano]

It'd be nice to have a constructor from a dense matrix, or ideally AbstractMatrix 🙂 Unless I'm totally missing it in the (sparse 🙃) documentation

[jacob-roth]

Adding on, is there a better way to convert a sparse matrix A from CSC to CSR besides the following?

Acsr = SparseMatricesCSR.SparseMatrixCSR(transpose(sparse(transpose(A))))