Enable PETScWrappers::MPI::SparseMatrix interface to account for off-diagonal elements during preallocation.
Added additional names for scalapack and blacs related libs on ubuntu 14.04
Indent files properly.
Merge pull request #188 from andre-massing/massing/fix-mumps-detection-on-ubuntu-14.04

Added additional names for scalapack and blacs related libs on ubuntu 14...
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.