Shell-script/terminal UI to make interactive juptyter easier

[jlperla]

Right now we go

cd /project
source $HOME/jupyter_py3/bin/activate
salloc --time=1:0:0 --ntasks=1 --cpus-per-task=2 --mem-per-cpu=1024M --account=def-$USER srun $VIRTUAL_ENV/bin/notebook.sh

Or something like that. We should automate those into a single script in cluster_tools which has defaults for time, cpus-per-task, mem-per-cpu and perhaps gives an option for GP support. The interaction with ntasks and julia procesess is unclear, but I think we want 1 in this setup.