v2: Updates

* Simplifies & beautifies everything
* Introduces a new Class system.
* Errors are defaulted to AWS's handler.
* New function names & more efficient handling.
* Should fix a majority of the errors.

Please read the README for more!

aws/Aws/WorkMailMessageFlow/Exception/WorkMailMessageFlowException.php

@@ -0,0 +1,9 @@
+<?php
+namespace Aws\WorkMailMessageFlow\Exception;
+
+use Aws\Exception\AwsException;
+
+/**
+ * Represents an error interacting with the **Amazon WorkMail Message Flow** service.
+ */
+class WorkMailMessageFlowException extends AwsException {}