TODO for 1.0:

    * Overall bandwidth tracking page (see all contexts at once) e.g. http://server/bw-status
    * Add the start time and time taken in the current period to the status page
    * Pretty up the status page
    * Zarro boogs

Ideas for future versions:

    * Integrate (somehow) with mod_mysql_vhost or mod_simple_vhost
    * Provide traffic shaping and rate limiting (bandwidth spike prevention)
    
