score board for Root-Me

• create a "participants.csv" file
• put its path in the function load_profiles (the path is absolute here because I use it in a shared envronnement).
• the "participants.csv" file consists of one row for each challenger, each made of 4 columns : profile name, real name, alias displayed, points at the start of the challenge
• dl the "simple_html_dom.php" code for dealing with html requests in PHP. I placed it in a php directory outside the server root.
• change the global variable date for starting the challenge