Dashboard metrics

This is the PR for the dashboard/channel metric graphs
For real conformance to the MVC pattern the controller shouldn't know anything about the view. Ie. it shouldn't know about jQuery or Morris or how they are used. Perhaps we should just attach the lineChartData to the scope move this setup code to a script either in the html page or even in a new script here: https://github.com/jembi/openhim-console/tree/master/app/scripts/util