Update guided and blank citindex dashboards

* Add new video to [Dashboards explained dashboard](http://kibana.cityindex.logsearch.io/#/dashboard/file/cityindex_guided.json)
* Make [static dashboard template](http://kibana.cityindex.logsearch.io/#/dashboard/file/cityindex_blank.json) same as http://kibana.cityindex.logsearch.io/#/dashboard/elasticsearch/New%20Dashboard