Update WampCraAuthProvider.php

Bugfix: PHP Fatal error: Cannot use object of type stdClass as array in WampCraAuthProvider.php on line 46
Merge pull request #58 from moave/master

Update WampCraAuthProvider.php
Changed the order that bootstrap looks for the autoload.php file
Fixed composer formatting
On open now includes the WelcomeMessage details
Fixed some WAMP-CRA issues and added tests
Fixed hash_pbkdf2 PHP 5.4 compatibility issue
Moved getDerivedKey to Utils
Refactored AuthenticationManager and WampCraAuthProvider and fixed some object vs array issues
Fixed interface issue
Changed $arguments to a stdClass instead of casting to an object
Merge commit '8192ddc88f70c1f3995425e5a5e3cd412bc3c739'

* commit '8192ddc88f70c1f3995425e5a5e3cd412bc3c739':
  Fixed interface issue Changed $arguments to a stdClass instead of casting to an object
  Refactored AuthenticationManager and WampCraAuthProvider and fixed some object vs array issues
  Moved getDerivedKey to Utils
  Fixed hash_pbkdf2 PHP 5.4 compatibility issue
  Fixed some WAMP-CRA issues and added tests
  On open now includes the WelcomeMessage details
  Fixed composer formatting
  Changed the order that bootstrap looks for the autoload.php file
  Update WampCraAuthProvider.php