Update README

Author: stephenyeargin

README.md

@@ -1,8 +1,6 @@
-# hubot-grafana
+# Grafana for Hubot
 
-Query Grafana dashboards and graphs
-
-See [`src/grafana.coffee`](src/grafana.coffee) for full documentation.
+Query Grafana dashboards.
 
 ## Installation
 
@@ -18,9 +16,21 @@ Then add **hubot-grafana** to your `external-scripts.json`:
 ]
 ```
 
+## Configuration Variables
+
+- `HUBOT_GRAFANA_HOST` - Host for your Grafana 2.0 install, e.g. 'http://play.grafana.org'
+- `HUBOT_GRAFANA_API_KEY` - API key for a particular user
+
+Example:
+
+```
+export HUBOT_GRAFANA_HOST=http://play.grafana.org
+export HUBOT_GRAFANA_API_KEY=abcd01234deadbeef01234
+```
+
 ## Sample Interaction
 
 ```
-user1>> hubot hello
-hubot>> hello!
+user1>> hubot grafana dashboard graphite-carbon-metrics
+hubot>> Graphite Carbon Metrics: http://play.grafana.org/render/dashboard/solo/graphite-carbon-metrics/?panelId=1&width=1000&height=500&from=now-6h - http://play.grafana.org/dashboard/db/graphite-carbon-metrics/?panelId=1&fullscreen&from=now-6h
 ```