* Added get_connectivity_as_matrix function.
* Added get_connectivity_as_matrix function.

== Added ==

* get_connectivity_as_matrix returns a matrix of node-cell connectivities.
  The number of rows of the returned matrix is the total number of cells and
  the number of columns is the maximum number of nodes in a cell. For cells
  with less than the maximum number of nodes, buffer with *fill_val*.



csdms/coupling,csdms/pymt,csdms/coupling