Writer for SparseMatrix + Fixing DCPSE.hpp for parallel

mpi_include

mpi_libs

src/CMakeLists.txt

src/DCPSE_op/DCPSE_Solver.hpp

src/DCPSE_op/DCPSE_copy/SupportBuilder.hpp

src/DCPSE_op/DCPSE_op_test.cpp

src/DCPSE_op/EqnsStructEigen.hpp

src/DCPSE_op/EqnsStructPetsc.hpp

src/Matrix/SparseMatrix_petsc.hpp