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

sample/lipp/UserConsentRedirect.php

@@ -2,8 +2,8 @@
 
 require __DIR__ . '/../bootstrap.php';
 
-use PayPal\Auth\Openid\PPOpenIdTokeninfo;
-use PayPal\Exception\PPConnectionException;
+use PayPal\Api\OpenIdTokeninfo;
+use PayPal\Exception\PayPalConnectionException;
 
 session_start();
 
@@ -16,8 +16,8 @@ if (isset($_GET['success']) && $_GET['success'] == 'true') {
 
     try {
         // Obtain Authorization Code from Code, Client ID and Client Secret
-        $accessToken = PPOpenIdTokeninfo::createFromAuthorizationCode(array('code' => $code), null, null, $apiContext);
-    } catch (PPConnectionException $ex) {
+        $accessToken = OpenIdTokeninfo::createFromAuthorizationCode(array('code' => $code), null, null, $apiContext);
+    } catch (PayPalConnectionException $ex) {
         ResultPrinter::printError("Obtained Access Token", "Access Token", null, $_GET['code'], $ex);
         exit(1);
     }