Update documentation

Author: rougin

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 All Notable changes to `Spark Plug` will be documented in this file
 
-## [0.4.0](https://github.com/rougin/spark-plug/compare/v0.2.0...v0.4.0) - 2016-03-26
+## [0.4.0](https://github.com/rougin/spark-plug/compare/v0.2.0...v0.4.0) - 2016-04-25
 
 ### Added
 - `Instance::create`

README.md

@@ -22,10 +22,10 @@ $ composer require rougin/spark-plug
 ### Basic Usage
 
 ``` php
-$codeIgniter = Rougin\SparkPlug\Instance::create();
+$ci = Rougin\SparkPlug\Instance::create();
 
 // You can now use its instance
-$codeIgniter->load->model('foo');
+$ci->load->helper('inflector');
 ```
 
 ### As a mock instance for unit testing
@@ -43,14 +43,15 @@ class SparkPlugTest extends \PHPUnit_Framework_TestCase
         // Path of your test application
         $appPath = __DIR__ . '/TestApp';
 
+        // Instance::create($appPath, $_SERVER, $GLOBALS)
         $ci = \Rougin\SparkPlug\Instance::create($appPath);
 
         $this->assertInstanceOf('CI_Controller', $ci);
     }
 }
 ```
 
-**NOTE**: [rougin/codeigniter](https://github.com/rougin/codeigniter) and a test application directory are required to use it as a mock instance. Kindly check the [tests](https://github.com/rougin/spark-plug/tree/master/tests) directory for more information.
+**NOTE**: To create a mock instance, [rougin/codeigniter](https://github.com/rougin/codeigniter) and a test application directory are required. Kindly check the [tests](https://github.com/rougin/spark-plug/tree/master/tests) directory for more examples.
 
 ## Change Log