* Add config option `enableRealtime` that, if set to true, will cause realtime metrics to be displayed above the historicaly view counts for all view IDs
* Add in the v3 Google API client and construct a service for it conditionally if realtime metrics are enabled
* Update google analytics data pulling code to retrieve realtime metrics using the v3 client if realtime metrics are enabled in settings
* Update table generation code to display fetched realtime metrics if they are available
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