Robustness + check if tmp dir exists
Robustness + check if tmp dir exists

Overall robustness to paths containing spaces improved
In create_lock_folder(): switch -p not used anymore when creating the
"running scripts folder" (i.e. current folder must already exist)
Increased log verbosity in run_main()

brianonn/scripts_NAS4Free,dragon788/scripts_NAS4Free,fritz-hh/scripts_NAS4Free