Update README.md

Author: IbrahimTareq

Diff for: README.md

@@ -1,19 +1,73 @@
 # MessageMedia Webhooks PHP SDK
 [![Travis Build Status](https://api.travis-ci.org/messagemedia/webhooks-php-sdk.svg?branch=master)](https://travis-ci.org/messagemedia/webhooks-php-sdk)
+[![Pull Requests Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat)](http://makeapullrequest.com)
 [![PHP version](https://badge.fury.io/ph/messagemedia%2Fwebhooks-sdk.svg)](https://badge.fury.io/ph/messagemedia%2Fwebhooks-sdk)
 
 The MessageMedia Webhooks allows you to subscribe to one or several events and when one of those events is triggered, an HTTP request is sent to the URL of your choice along with the message or payload. In simpler terms, it allows applications to "speak" to one another and get notified automatically when something new happens.
 
-## ⭐️ Installing via Composer
+![Webhooks Flow](http://i66.tinypic.com/2ufxf81.jpg)
+
+## Table of Contents
+* [Authentication](#closed_lock_with_key-authentication)
+* [Errors](#interrobang-errors)
+* [Information](#newspaper-information)
+  * [Slack and Mailing List](#slack-and-mailing-list)
+  * [Bug Reports](#bug-reports)
+  * [Contributing](#contributing)
+* [Installation](#star-installation)
+* [Get Started](#clapper-get-started)
+* [API Documentation](#closed_book-api-documentation)
+* [Need help?](#confused-need-help)
+* [License](#page_with_curl-license)
+
+## :closed_lock_with_key: Authentication
+
+Authentication is done via API keys. Sign up at https://developers.messagemedia.com/register/ to get your API keys.
+
+Requests are authenticated using HTTP Basic Auth or HMAC. Provide your API key as the auth_user_name and API secret as the auth_password.
+
+## :interrobang: Errors
+
+Our API returns standard HTTP success or error status codes. For errors, we will also include extra information about what went wrong encoded in the response as JSON. The most common status codes are listed below.
+
+#### HTTP Status Codes
+
+| Code      | Title       | Description |
+|-----------|-------------|-------------|
+| 400 | Invalid Request | The request was invalid |
+| 401 | Unauthorized | Your API credentials are invalid |
+| 403 | Disabled feature | Feature not enabled |
+| 404 | Not Found |	The resource does not exist |
+| 50X | Internal Server Error | An error occurred with our API |
+
+## :newspaper: Information
+
+#### Slack and Mailing List
+
+If you have any questions, comments, or concerns, please join our Slack channel:
+https://developers.messagemedia.com/collaborate/slack/
+
+Alternatively you can email us at:
+[email protected]
+
+#### Bug reports
+
+If you discover a problem with the SDK, we would like to know about it. You can raise an [issue](https://github.com/messagemedia/signingkeys-nodejs-sdk/issues) or send an email to: [email protected]
+
+#### Contributing
+
+We welcome your thoughts on how we could best provide you with SDKs that would simplify how you consume our services in your application. You can fork and create pull requests for any features you would like to see or raise an [issue](https://github.com/messagemedia/signingkeys-nodejs-sdk/issues)
+
+## :star: Installation
 Run the Composer command to install the latest stable version of the Messages SDK:
 ```
 composer require messagemedia/webhooks-sdk
 ```
 
-## 🎬 Get Started
+## :clapper: Get Started
 It's easy to get started. Simply enter the API Key and secret you obtained from the [MessageMedia Developers Portal](https://developers.messagemedia.com) into the code snippet below.
 
-### 🚀 Create a webhook
+### Create a webhook
 ```php
 <?php
 require_once('vendor/autoload.php');
@@ -36,7 +90,7 @@ $body->template = '{"id":"$mtId","status":"$statusCode"}';
 $result = $webhooks->createWebhook($body);
 ```
 
-### 📥 Retrieve all webhooks
+### Retrieve all webhooks
 ```php
 <?php
 require_once('vendor/autoload.php');
@@ -55,7 +109,7 @@ $result  =  $webhooks->retrieveWebhook($page, $pageSize);
 print_r($result);
 ```
 
-### 🔄 Update a webhook
+### Update a webhook
 You can get a webhook ID by looking at the `id` of each webhook created from the response of the above example.
 ```php
 <?php
@@ -82,7 +136,7 @@ $body->template = '{"id":"$mtId","status":"$statusCode"}';
 $result = $webhooks->updateWebhook($webhookId, $body);
 ```
 
-### ❌ Delete a webhook
+### Delete a webhook
 You can get a webhook ID by looking at the `id` of each webhook created from the response of the retrieve webhooks example.
 ```php
 <?php
@@ -100,11 +154,11 @@ $webhookId = "YOUR_WEBHOOK_ID";
 $webhooks->deleteWebhook($webhookId);
 ```
 
-## 📕 Documentation
-Check out the [full API documentation](DOCUMENTATION.md) for more detailed information.
+## :closed_book: API Reference Documentation
+Check out the [full API documentation](https://developers.messagemedia.com/code/webhooks-api-documentation/) for more detailed information.
 
-## 😕 Need help?
+## :confused: Need help?
 Please contact developer support at [email protected] or check out the developer portal at [developers.messagemedia.com](https://developers.messagemedia.com/)
 
-## 📃 License
+## :page_with_curl: License
 Apache License. See the [LICENSE](LICENSE) file.