parse Authorization header with method

before => Authorization: cnVtaWRpZXI6MTIzNA
after  => Authorization: Basic cnVtaWRpZXI6MTIzNA

http://en.wikipedia.org/wiki/Basic_access_authentication
> The Authorization header is constructed as follows:
>   1. Username and password are combined into a string "username:password"
>   2. The resulting string literal is then encoded using Base64
>   3. The authorization method and a space i.e. "Basic " is then put
>      before the encoded string.

3번 rule 에 따라 method 를 명시해줘야 합니다.

`curl` 의 -u|--user 옵션을 사용해서 test req 를 쉽게 만들 수 있습니다.

lib/Silex/Donnenwa/Web/Controller/Root.pm

@@ -41,7 +41,7 @@ sub auto :Private {
     if ($mobile_user) {
 ## $auth is 'cnVtaWRpZXI6MTIzNA==
 ## MIME::Base64::encode
-        my $user_info = decode_base64($mobile_user);
+        my $user_info = decode_base64((split / /, $mobile_user)[1]);
         my ( $username, $password ) = $self->api->mobile_user($user_info);
 
         if ($username && $password) {