bugfix: ex3.c works now

add coupling vertices

DMNetwork: Set a limit on the maximum number of components registered.

DMNetwork: Added DMNetworkGetComponent to get the component data directly.

The component data used to be accessed by obtaining the component data array first
through DMNetworkGetComponentDataArray a

DMNetwork: Added DMNetworkGetComponent to get the component data directly.

The component data used to be accessed by obtaining the component data array first
through DMNetworkGetComponentDataArray and then by getting the offset for a given point
via DMNetworkGetComponentKeyOffset. Added a new function DMNetworkGetComponent through which
the component data can be accessed directly without having to expose the component data array
or the offset.

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bugfix and update for DMCreateMatrix_Network()

DMNetwork: The subnetwork example works in parallel now.

Modified DMNetworkDistribute() to set up the vertices and edges for
each subnetwork after the partitioning is done.

DMNetwork: Add vertex and edge information in subnetwork

Each subnetwork stores a list of its vertices and edges. Note that these
are just integer numbers that are based off the numbering provided b

DMNetwork: Add vertex and edge information in subnetwork

Each subnetwork stores a list of its vertices and edges. Note that these
are just integer numbers that are based off the numbering provided by Plex.

Added API function DMNetworkGetSubnetworkInfo to retrieve the subnetwork info.

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DMNetwork: Feature subnetwork.

Added data structure to hold information about the subnetworks.
Modified API (DMNetworkSetSizes, DMNetworkSetEdgeList) to include subnetwork information.
Modified DMNe

DMNetwork: Feature subnetwork.

Added data structure to hold information about the subnetworks.
Modified API (DMNetworkSetSizes, DMNetworkSetEdgeList) to include subnetwork information.
Modified DMNetworkLayoutSetUp() to work with subnetwork information. Added subnetwork id
in ComponentHeader.

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mv VecScatterDestroy(&aij->Mvctx) from MatDisAssemble_MPIAIJ() to MatSetUpMultiply_MPIAIJ()

use mpi1 for DMCreateMatrix_Network: isNest; see src/ksp/ksp/examples/tutorials/network/runex1_nest_2

fix build error complained by nightly tests

VecView_Network() works only with ASCII viewer; enable other formats using VecView_Seq/MPI()
Contributed-by: Abhyankar, Shrirang G. <abhyshr@anl.gov>

nodes -> vertices

rename DMNetworkGetComponentTypeOffset -> DMNetworkGetComponentKeyOffset

rename DMNetworkGetConnectedNodes() -> DMNetworkGetConnectedVertices()

fix complex build error

fix build failure with fortran interface

rename some routines; final cleanup; update tests

VecView_Network() gives correct edge/vertex ID now

add 'id' to _p_DMNetworkComponentHeader. Parallel does not work yet

cleanup by factoring VecArrayPrint_private() for reuse

bugfix

implement VecView_Network_MPI()

add VecView_Network()
Requested-by: Dennis Agnew Jr. <Dennis.Agnew@sdstate.edu> and Greg Bowen <Gregory.Bowen@sdstate.edu>