july 18, 2013: added contextual selection for users-per-time graph
july 17, 2013: added a users per time graph
june 13, 2013: bar graph containing the number of users per number of sites is now implemented
june 10, 2013: bar graph comparing the number of users per role is now implemented
june 3, 2013: tabular representation of users information is now shown
may 30, 2013: added a temporary enqueue script to link the d3.js library added javascript to plugins.php to grab a PHP array using json_encode
may 29, 2013: corrected the get function in class.network-stats-data.php to return the json decoded string as an associative array plugins section now shows a table containing the sites and the plugins that they use
may 28, 2013: added a get function to class.network-stats-data.php to grab the contents of the JSON file