Openfaln Datasource - 3 party plugin

[Openfalcon](https://github.com/open-falcon() is a system monitor solution made by xiaomi.

How to install?

• Please download the latest version of Grafana on the github. (currently the latest one is tag -> v3.0-beta7)
• Finish the all setup up. (more info please refer the README.md in Grafana project.)

cd $GOPATH/src/github.com/grafana/grafana
go run build.go setup            (only needed once to install godep)
godep restore                    (will pull down all golang lib dependencies in your current GOPATH)
go run build.go build

npm install
npm install -g grunt-cli
grunt

• Checkout this plugin

cd $GRAFANA_PATH/public_gen/app/plugins/datasource
git clone https://github.com/masato25/grafana-openfalcon

• Start grafana-server

./bin/grafana-server

• if the installation is successed, You will see Openfalcon on the datasource list.

Support grafana-cli [not yet, but this is on ours plan]

grafana-cli plugins install grafana-openfalcon

#edit conf/default.ini, add lines below
[plugin.openfalocn]
path = $GrafanaPath/data/plugins/grafana-openfalcon