minor ownedmap optimization
Merge branch 'master' of https://github.com/CVerhoosel/libmatrix
add graph check for matrix_add
Merge branch 'master' of https://github.com/nutils/libmatrix
implement dynamic matrix construction
Merge branch 'master' of https://github.com/nutils/libmatrix
change nonzero[0][0] to 'first'
improve Map dof allocation, allow for bool arrays
add default export for complete methods
remove superfluous comm arguments and check equals
add Scalar object plus 'Array' helper function