update README, add screenshot

README.md

@@ -1,4 +1,30 @@
-### Development
+# Statusmap panel for Grafana
+
+
+
+![Statusmap sample panel](https://raw.githubusercontent.com/flant/grafana-statusmap/master/src/img/grafana-statusmap-panel.png)
+
+
+## Features
+
+* Group values into rows and buckets by query's legend
+* User defined color mapping
+* Multiple values in bucket display in tooltip
+* Interval shaping to better visual representation
+* Represent null values as empty bucket or as zero
+
+Supported / Tested Data Sources :
+--------------------------------
+
+* Prometheus
+* TestData
+
+Tested Grafana versions :
+-------------------------
+
+* 5.1.3
+
+## Development
 
 ```
 docker run --rm -it -v $PWD:/var/lib/grafana/plugins/status-heatmap-panel \
@@ -11,9 +37,13 @@ docker run --rm -it -v $PWD:/var/lib/grafana/plugins/status-heatmap-panel \
 grunt watch
 ```
 
-Prometheus
+### Acknowledgements
+
+This panel plugin is based on "Heatmap" panel by Grafana with ideas from Carpet plot, Discrete panel, Status Panel, Status Dot, Status By Group.
+
+#### Changelog
+
+##### v0.0.1
+
+- First public release
 
-```
-ssh kube-cluster -L 3001:localhost:9001
-kubectl port-forward prometheus-0 9001:9090 -n prom-namespace
-```