added support to start only a single process per job (on the frst node), instead of x on each node. Partial fix for #206
allow 0 runtime as infinite
Adding interactive support for SLURM Jobs (incomplete)
added support for all job description options to slurm adaptor, including some tests
add option to start only a single process, even when reserving multiple nodes and/or slots to JobDescription
Merge remote-tracking branch 'origin/develop' into feature/single-process
Merge pull request #211 from NLeSC/feature/single-process

Feature/single process