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

lib/PayPal/Exception/PayPalConnectionException.php

@@ -0,0 +1,68 @@
+<?php
+
+namespace PayPal\Exception;
+
+/**
+ * Class PayPalConnectionException
+ *
+ * @package PayPal\Exception
+ */
+class PayPalConnectionException extends \Exception
+{
+    /**
+     * The url that was being connected to when the exception occured
+     *
+     * @var string
+     */
+    private $url;
+
+    /**
+     * Any response data that was returned by the server
+     *
+     * @var string
+     */
+    private $data;
+
+    /**
+     * Default Constructor
+     *
+     * @param string $url
+     * @param string    $message
+     * @param int    $code
+     */
+    public function __construct($url, $message, $code = 0)
+    {
+        parent::__construct($message, $code);
+        $this->url = $url;
+    }
+
+    /**
+     * Sets Data
+     *
+     * @param $data
+     */
+    public function setData($data)
+    {
+        $this->data = $data;
+    }
+
+    /**
+     * Gets Data
+     *
+     * @return string
+     */
+    public function getData()
+    {
+        return $this->data;
+    }
+
+    /**
+     * Gets Url
+     *
+     * @return string
+     */
+    public function getUrl()
+    {
+        return $this->url;
+    }
+}