More languages, new graphs

- Additions: - Improved graphs: You can now graph by time spent online and total answers. You can also see the data in table format and pinch a custom date selection. This functionality is available for graphs on 1) Dashboard, 2) Course dashboards, 3) Course Stats area (in edit course) - New languages: Punjabi - No audio yet Somali - No audio or speaking yet Irish - No audio or speaking yet - Bug fixes: - Fixed issue where category stats KPIs were not showing during play mode for certain users