add sub-module api example.(ipfs-inactive#544)

Author: nunofmn

examples/sub-module/sub-module.js

@@ -0,0 +1,15 @@
+'use strict'
+
+const files = require('../../src/files')('/ip4/127.0.0.1/tcp/5001')
+
+files.cat('/ipfs/QmYwAPJzv5CZsnA625s3Xf2nemtYgPpHdWEz79ojWnPbdG/readme', (err, res) => {
+  if (err) {
+    return console.error('Error fetching file', err)
+  }
+
+  if (res.readable) {
+    res.pipe(process.stdout)
+  } else {
+    console.log(res)
+  }
+})

src/utils/module-config.js

@@ -15,6 +15,7 @@ module.exports = (arg) => {
     const maddr = multiaddr(arg).nodeAddress()
     config.host = maddr.address
     config.port = maddr.port
+    return requestAPI(config)
   } else {
     throw new Error('Argument must be a send function or a config object.')
   }