More GhostingFunctor documentation
More GhostingFunctor documentation

Added some documentation on what additional steps would be needed
if the user can't attach an algebraic or coupling GhostingFunctor
to the DofMap until after the system has been initialized.

pbauman/libmesh,jwpeterson/libmesh,dschwen/libmesh,dschwen/libmesh,jwpeterson/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,jwpeterson/libmesh,jwpeterson/libmesh,capitalaslash/libmesh,pbauman/libmesh,BalticPinguin/libmesh,libMesh/libmesh,hrittich/libmesh,dschwen/libmesh,pbauman/libmesh,jwpeterson/libmesh,libMesh/libmesh,hrittich/libmesh,pbauman/libmesh,libMesh/libmesh,hrittich/libmesh,roystgnr/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,roystgnr/libmesh,jwpeterson/libmesh,pbauman/libmesh,libMesh/libmesh,90jrong/libmesh,BalticPinguin/libmesh,BalticPinguin/libmesh,capitalaslash/libmesh,BalticPinguin/libmesh,hrittich/libmesh,pbauman/libmesh,hrittich/libmesh,libMesh/libmesh,dschwen/libmesh,pbauman/libmesh,hrittich/libmesh,90jrong/libmesh,90jrong/libmesh,hrittich/libmesh,capitalaslash/libmesh,dschwen/libmesh,libMesh/libmesh,roystgnr/libmesh,dschwen/libmesh,capitalaslash/libmesh,90jrong/libmesh,libMesh/libmesh,dschwen/libmesh,90jrong/libmesh,jwpeterson/libmesh,jwpeterson/libmesh,BalticPinguin/libmesh,90jrong/libmesh,roystgnr/libmesh,capitalaslash/libmesh,90jrong/libmesh,roystgnr/libmesh,libMesh/libmesh,roystgnr/libmesh,90jrong/libmesh,hrittich/libmesh,capitalaslash/libmesh,capitalaslash/libmesh,pbauman/libmesh,BalticPinguin/libmesh,capitalaslash/libmesh,hrittich/libmesh,90jrong/libmesh,dschwen/libmesh,pbauman/libmesh