Sets up whitelist tools files and installation script

Moves whitelist tools into repo and adds them to installation script. Creates function cp_to_bak, similar to mv_to_bak (if argument exists, copy it to a backed-up location; handles dirs or files). Modifies cp_to_bak and mv_to_bak to include "-i" option, for the very unlikely case that the target already exists (which would require the command to be run on the same dir 2x in the exact same second - but it could happen, and we probably don't want to overwrite the original backup).