Enable PETScWrappers::MPI::SparseMatrix interface to account for off-diagonal elements during preallocation.
Indent files properly.
Enable PETScWrappers::MPI::SparseMatrix interface to account for off-diagonal elements during preallocation.
Merge branch 'petsc_mat_alloc' of https://github.com/agrayver/dealii into petsc_mat_alloc
Merge pull request #187 from agrayver/petsc_mat_alloc

Preallocation of PETScWrappers::MPI::SparseMatrix with off-diagonal block nonzeros.