Changed README to use Markdown and added install instructions.

README.md

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+# node-jsonrpc2
+
+This is a JSON-RPC server and client library for node.js <http://nodejs.org/>,
+the V8 based evented IO framework.
+
+## Install
+
+To install node-jsonrpc2 in the current directory, run:
+
+    npm install jsonrpc2
+
+## Usage
+
+Firing up an efficient JSON-RPC server becomes extremely simple:
+
+``` javascript
+var rpc = require('jsonrpc');
+
+function add(first, second) {
+    return first + second;
+}
+rpc.expose('add', add);
+
+rpc.listen(8000, 'localhost');
+```
+
+And creating a client to speak to that server is easy too:
+
+``` javascript
+var rpc = require('jsonrpc');
+var sys = require('sys');
+
+var client = rpc.getClient(8000, 'localhost');
+
+client.call('add', [1, 2], function(result) {
+    sys.puts('1 + 2 = ' + result);
+});
+```
+
+To learn more, see the examples directory, peruse test/jsonrpc-test.js, or
+simply "Use The Source, Luke".
+
+More documentation and development is on its way.