support grafana releases install + more than on datasource
bump version to 0.2.0
provide a way to choose the nginx install recipe
fix the default param handling
feature: upgrade to grafana 1.6.1
reinstate the 'use strict' in the config.js template file
Merge pull request #1 from looztra/grafana-160

Support for Grafana 1.6.x + more than one datasource (graphite, influxdb, opentsdb...)