chore(grafana): Update to grafana 3.1.0

Author: Jonathan Chauncey

grafana/rootfs/Dockerfile

@@ -6,7 +6,7 @@ RUN apt-get update \
 	&& apt-get install -y libfontconfig \
 	&& curl -sL -o /usr/share/grafana/envtpl https://github.com/arschles/envtpl/releases/download/0.2.3/envtpl_linux_amd64 \
 	&& chmod +x /usr/share/grafana/envtpl \
-	&& curl -so /tmp/grafana.deb https://grafanarel.s3.amazonaws.com/builds/grafana_3.0.4-1464167696_amd64.deb \
+	&& curl -so /tmp/grafana.deb https://grafanarel.s3.amazonaws.com/builds/grafana_3.1.0-1468321182_amd64.deb \
 	&& dpkg -i /tmp/grafana.deb \
 	&& rm /tmp/grafana.deb \
 	&& rm /etc/grafana/grafana.ini \