util for updating cartodb visualization
create visualizations app and amend utils to use this
CLOSED - task 127: Add db ip cache table to main 
https://github.com/DigitalCampus/django-oppia/issues/issue/127
Fix cartodb update to use new viz model
CLOSED - task 125: Add size and other data to the media model 
https://github.com/DigitalCampus/django-oppia/issues/issue/125
CLOSED - task 113: Not removing old versions of courses from upload dir 
https://github.com/DigitalCampus/django-oppia/issues/issue/113
CLOSED - task 124: Write utility script to test existence of media files
at the given urls 
https://github.com/DigitalCampus/django-oppia/issues/issue/124
update version nos
fix for urllib/urllib2
fix for urllib
new branch and version no
OPEN - task 133: Infographic type page to show all activity/users etc 
https://github.com/DigitalCampus/django-oppia/issues/issue/133
CLOSED - task 134: Add full country name and geonames response to
UserLocationVisualization 
https://github.com/DigitalCampus/django-oppia/issues/issue/134
update docs
fix issues with ip2location script
CLOSED - task 133: Infographic type page to show all activity/users etc 
https://github.com/DigitalCampus/django-oppia/issues/issue/133
OPEN - task 129: Add visualisation to display map from cartodb 
https://github.com/DigitalCampus/django-oppia/issues/issue/129
OPEN - task 136: Add hits by popular languages 
https://github.com/DigitalCampus/django-oppia/issues/issue/136
CLOSED - task 137: Store lang as separate field in tracker 
https://github.com/DigitalCampus/django-oppia/issues/issue/137
CLOSED - task 136: Add hits by popular languages 
https://github.com/DigitalCampus/django-oppia/issues/issue/136