Update readme

README.md

@@ -7,13 +7,36 @@ npm install node-bing-api
 ````
 
 ### Usage
+
+Require the library and initialialize it with your account key:
+
 ````
 var Bing = require('node-bing-api')({ accKey: "your-account-key" });
+````
 
-Bing.search("Android", function(error, res, body){
+Web Search
+````
+Bing.search("Pizza",
+
+  // Callback
+  function(error, res, body){
+    console.log(body);
+  },
+
+  // Search options
+  {
+    top: 10,  // Number of results. Max 50.
+    skip: 3   // Skip first 3 results
+  });
+````
+
+Images Search
+````
+Bing.images("Ninja Turtles", function(error, res, body){
   console.log(body);
-});
+}, {skip: 50});
 ````
 
 ### License
 MIT
+