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/Signature/AnonymousSignature.php

@@ -19,7 +19,8 @@ class AnonymousSignature implements SignatureInterface
     public function presign(
         RequestInterface $request,
         CredentialsInterface $credentials,
-        $expires
+        $expires,
+        array $options = []
     ) {
         return $request;
     }