autoconf stubs for parmetis
importing parmetis source
allow for --with-parmetis-cppflags=..., if required
bootstrap
make parmetis contingent on MPI.  still need to automate mpicxx/mpicc detection
need to find mpicc, an MPI-enabled C compiler to build parmetis without requiring the user to specify
run bootstrap
parmetis requires metis, so set the default configuration accordingly
Merged in Ben's ParMETIS integration and fixed some conflicts.
Merge branch 'benkirk-parmetis_integration' into feature_MPI