5430: added new hide_side_menu and show_side_menu language items, and updated the JS
5331 added calendar extention for  module develop documention
5447 have logout redirect to index.php, which redirects to login.php and resets the session token
changed js calling in php file
d3.v3.min.js saved in jscipts from http://d3js.org/d3.v3.min.js
proper indentation
proper indentation of mods/_standard/tracker/my_stats.php
pie chart added for content details in mod/_standard/tracker/content_details.php
adjusted pie chart dimensions
modified bar graph to show time onhover on bars
Merge branch 'master' into gsoc2014