added sample js to interact with the smart contract

lesson-2/chapter-14/sample.js

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+var abi = x;/* abi generated by the compiler */
+var ZombieFeedingContract = web3.eth.contract(abi)
+var contractAddress = x;/* our contract address on Ethereum after deploying */
+var ZombieFeeding = ZombieFeedingContract.at(contractAddress)
+
+// Assuming we have our zombie's ID and the kitty ID we want to attack
+let zombieId = 1;
+let kittyId = 1;
+
+// To get the CryptoKitty's image, we need to query their web API. This
+// information isn't stored on the blockchain, just their webserver.
+// If everything was stored on a blockchain, we wouldn't have to worry
+// about the server going down, them changing their API, or the company
+// blocking us from loading their assets if they don't like our zombie game ;)
+let apiUrl = "https://api.cryptokitties.co/kitties/" + kittyId
+$.get(apiUrl, function(data) {
+  let imgUrl = data.image_url
+  // do something to display the image
+})
+
+// When the user clicks on a kitty:
+$(".kittyImage").click(function(e) {
+  // Call our contract's `feedOnKitty` method
+  ZombieFeeding.feedOnKitty(zombieId, kittyId)
+})
+
+// Listen for a NewZombie event from our contract so we can display it:
+ZombieFactory.NewZombie(function(error, result) {
+  if (error) return
+  // This function will display the zombie, like in lesson 1:
+  generateZombie(result.zombieId, result.name, result.dna)
+})