In case that the main local script fails or it is crtl+c'ed

Ignored install/ folder to ignored files. Updated
ces_slurm_simulator to commit #412c0f59

Add ces_slurm_simulator as a submodule instead of making the
install script clone a repo. Is cleaner and uses git to
properly track files.

First version, needs to be adapted to the last MWF format proposal.