Renaming Namespaces and Organizing Classes

- Updated OpenId classes to be in API namespace
- Updated PP Naming Convention to PayPal Naming Convention
- FormatConverter Class got its own namespace
- Handlers are grouped in Handler namespace
- Samples and Tests Updated Accordingly

tests/PayPal/Test/Exception/PayPalConfigurationExceptionTest.php

@@ -0,0 +1,38 @@
+<?php
+use PayPal\Exception\PayPalConfigurationException;
+
+/**
+ * Test class for PayPalConfigurationException.
+ *
+ */
+class PayPalConfigurationExceptionTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @var PayPalConfigurationException
+     */
+    protected $object;
+
+    /**
+     * Sets up the fixture, for example, opens a network connection.
+     * This method is called before a test is executed.
+     */
+    protected function setUp()
+    {
+        $this->object = new PayPalConfigurationException('Test PayPalConfigurationException');
+    }
+
+    /**
+     * Tears down the fixture, for example, closes a network connection.
+     * This method is called after a test is executed.
+     */
+    protected function tearDown()
+    {
+    }
+
+    public function testPPConfigurationException()
+    {
+        $this->assertEquals('Test PayPalConfigurationException', $this->object->getMessage());
+    }
+}
+
+?>