align hash table buckets on 8 bytes

Link: https://github.com/GeneAssembly/biosal/issues/328
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
rename memory routines

Link: https://github.com/GeneAssembly/biosal/issues/330
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
don't call MPI functions when using one rank

Link: https://github.com/GeneAssembly/biosal/issues/324
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
Merge branch 'energy' of github.com:sebhtml/biosal into energy