README updated.

Author: keiono

README.md

@@ -1,12 +1,16 @@
-cytoscape-d3
+Cytoscape to D3.js Exporter
 ============
 
 ## What is this for?
-This is a Cytoscape 3 App for exporting network and table data in D3.js network format.
+This is a [Cytoscape 3]() App for exporting network and its data table to [D3.js](http://d3js.org/) compatible JSON.  D3.js is a general data visualization JavaScript library, and some of its presets support network/tree style data.  This App directly creates JSON file for those presets from Cytoscape network and data tables.
 
-Currently, this app supports:
+Currently, this App supports:
 
-* Network JSON for force layout
-* Tree JSON
+* Network JSON for force layout ([example](http://bl.ocks.org/mbostock/4062045))
+* Tree JSON ([example](http://mbostock.github.io/d3/talk/20111018/tree.html))
+
+## How to Use
+Build, and install the JAR file from Cytoscape's App manager.  You can export your network and its data table as JSON from *File-->Export-->Network*.
+
+**For Tree data, you need to select root node manually (simply click the root node before exporting)**.
 
-For Tree data, you need to select root node manually (simply click the root node before exporting).