DEFAULT_OUTPUT_DIR changed to DEFAULT_STATS_OUTPUT_DIR in basic configuration. Stats files that can't be written in the experiment directory are now saved into the DEFAULT_OUTPUT_DIR path. Related to #555

Added pre-requisites and an example

The dbfix procedure won't delete the faulty database but change its name as a backup if the process fails

Added a new basic configuration: DEFAULT_OUTPUT_DIR where the statistics output file will be saved if the user doesn't have enough permissions to create the file in the experiment's location. Added a small fix for the csv generation of statistics

Slurm is not loaded.
Ssh is not well configured.
SSH is not avaliable.
SSH refuses the connection.
Command is not avaliable on the remote platform

For unknown reason, check_call no longer waits for plot to be closed. Instead check_output must be used

Improved error message.