sinteractive is a small wrapper that submits a sbatch job to slurm to start a GNU screen session on a
compute node. It will wait until the job starts and then SSH to the compute
node attached to the screen session that was started. This creates a detachable
interactive shell session as well as allowing X forwarding to work.
You can specify any valid sbatch options as necessary.
There is one non-slurm option: --port '<port number>', for propoer port forwarding. By default, sinteractive will use the port specified by the variable $ANVIO_PORT.