Added some doc

README.md

@@ -1,2 +1,54 @@
 # node-kiwicoin
-Unofficial kiwi-coin.com API client for Node.js
+Unofficial [Kiwi-Coin.com](https://kiwi-coin.com) API client for Node.js.
+
+## Installation
+
+The package is available on [NPM](https://www.npmjs.com/package/kiwicoin) as `kiwicoin`.
+
+```Shell
+npm install kiwicoin
+```
+
+## Usage
+
+Using the private services:
+
+```javascript
+var Kiwicoin = require('kiwicoin');
+
+var kiwiClient = new Kiwicoin("YourUserId", "YourApiKey", "YourSecret");
+kiwiClient.balance(function(err, info) {
+    console.log(err, info);
+  });
+```
+
+Take a look on the wiki to get instructions on how to:
+
+* [Find my userId](<https://github.com/wcomnisky/node-kiwicoin/wiki/Kiwi-Coin#how-to-find-the-userid>)
+* [Create/Enable my API Key and Secret](<https://github.com/wcomnisky/node-kiwicoin/wiki/Kiwi-Coin#how-to-createfindenable-the-api-key>)
+
+If you just want to use the public services you __don't need__ to provide the userID / API Key / Secret.
+
+The public services are:
+
+* Ticker (`ticker`)
+* Order book (`order_book`)
+
+```javascript
+var Kiwicoin = require('kiwicoin');
+
+var kiwiClient = new Kiwicoin();
+kiwiClient.ticker(function(err, info) {
+    console.log(err, info);
+  });
+```
+
+### Kiwi-Coin Request limits
+
+Be aware about their limits:
+
+> _Do not make more than 600 requests per 10 minutes or we will ban your IP address._
+
+## License
+
+[MIT](LICENSE)