Slurmpie

Fixed double to single quotes for wrapped commands, should fix unrecognized commands.

Fixed compatibility with newer slurm versions:

- Wrapped commands are now in quotes
- slurm might give an error, but still return exit code 0. In those cases we now do display an error.

Fixed version number

- Added option to specify nodelist

- Added option to set a root directory for log files

- Added option to set a root directory for log files