Elementwise operations fixed on dense matrices for bug in #51.
Elementwise operations fixed on dense matrices for bug in #51.

agisga/nmatrix,agisga/nmatrix,agisga/nmatrix,thisMagpie/nmatrix,johnmarinelli/nmatrix,thisMagpie/nmatrix,johnmarinelli/nmatrix,wlevine/nmatrix,johnmarinelli/nmatrix,johnmarinelli/nmatrix,wlevine/nmatrix,janusnic/nmatrix,janusnic/nmatrix,wlevine/nmatrix,thisMagpie/nmatrix,janusnic/nmatrix,agisga/nmatrix,wlevine/nmatrix,janusnic/nmatrix,thisMagpie/nmatrix