Reinstate mediaUrl parameter on twilioClient and minor fix on Readme

Author: hortega

README.md

@@ -44,7 +44,7 @@ if you don't have one already.
 1. Navigate to the project directory in your terminal and run:
 
     ```bash
-    npm install
+    $ npm install
     ```
 
     This should install all of our project dependencies from npm into a local
@@ -67,8 +67,8 @@ if you don't have one already.
     informing you of an exception.
 
     ```bash
-    npm install -g nodemon
-    nodemon .
+    $ npm install -g nodemon
+    $ nodemon .
     ```
 
 

twilioClient.js

@@ -5,8 +5,8 @@ module.exports.sendSms = function(to, message) {
   client.messages.create({
     body: message,
     to: to,
-    from: config.sendingNumber
-//  mediaUrl: imageUrl
+    from: config.sendingNumber,
+    mediaUrl: imageUrl
   }).then(function(data) {
     console.log('Administrator notified');
   }).catch(function(err) {