feat(examples): add a getting-started example

Author: SidHarder

examples/gettingstarted/hello.txt

@@ -0,0 +1,3 @@
+hello, how are you today? This is just some random content. 
+
+e9a7fd36-d785-4c90-95ae-011329425f9a

examples/gettingstarted/index.js

@@ -0,0 +1,40 @@
+var fs = require('fs')
+var IPFS = require('ipfs')
+var node = new IPFS()
+
+var fileName = './hello.txt'
+
+// Display version of js-ipfs
+node.version(function (err, versionData) {
+  if (!err) {
+    console.log(versionData)
+    // We can load the repo like this.
+    node.load(function (err) {
+      // If there is an erro loading the repo we can find out like this.
+      if (err) {
+        console.log(err)
+      } else {
+        console.log('The repo is loaded now.')
+      }
+      // Ok let's go online and do some cool stuff
+      node.goOnline(function () {
+        // We can test to see if we actually are online if we want to
+        if (node.isOnline()) console.log('Yep, we are online')
+        // Now that we are online now. Let's add a file.
+        var readStream = fs.createReadStream(fileName)
+        node.files.add(readStream, function (err, data) {
+          if (!err) {
+            // Awesome we've added a file so let's retrieve and display its contents from IPFS
+            node.files.cat(data[0].hash, function (err, stream) {
+              if (!err) {
+                stream.pipe(process.stdout, { end: false })
+                // let's call it a day now and go offline
+                node.goOffline()
+              } else { console.log('Oops for some reason there was a problem retrieving your file: ' + err) }
+            })
+          } else { console.log('Oops there was a problem: ' + err) }
+        })
+      })
+    })
+  } else { console.log(err) }
+})