Enabled Billing Plans and Agreements APIs

- Added API Classes, Samples, and Tests
- Updated Functional Tests
- Updated Documentation with new SDK Name
- Updated Few Samples to use newer nicer result page

sample/lipp/GetUserInfo.php

@@ -34,4 +34,4 @@ try {
     exit(1);
 }
 
-print_result("User Information", "User Info", $userInfo->getUserId(), $userInfo->toJSON(128));
+ResultPrinter::printResult("User Information", "User Info", $userInfo->getUserId(), $params, $userInfo);