Remove default authentication_policy value FIX colymba#77

Fixes type mismatch error when using arrays with default being boolean

code/RESTfulAPI.php

@@ -18,14 +18,14 @@ class RESTfulAPI extends Controller
 
     /**
    * Lets you select if the API requires authentication for access
-   * false = no authentication required
+   * null|false = no authentication required
    * true  = authentication required for all HTTP methods
    * array = authentication required for selected HTTP methods e.g. array('POST', 'PUT', 'DELETE')
    * 
    * @var boolean|array
    * @config
    */
-  private static $authentication_policy = false;
+  private static $authentication_policy;
 
 
     const ACL_CHECK_CONFIG_ONLY      = 'config';

doc/RESTfulAPI.md

@@ -11,7 +11,7 @@ Director:
 
 Config | Type | Info | Default
 --- | :---: | --- | ---
-`authentication_policy` | `boolean`/`array` | If true, the API will use authentication, if false no authentication required. Or an array of HTTP methods that require authentication | false
+`authentication_policy` | `boolean`/`array` | If true, the API will use authentication, if false|null no authentication required. Or an array of HTTP methods that require authentication | false
 `access_control_policy` | `boolean`/`string` | Lets you select which access control checks the API will perform or none at all. | 'ACL_CHECK_CONFIG_ONLY'
 `dependencies` | `array` | key => value pairs sepcifying the components classes used for the `'authenticator'`, `'queryHandler'` and `'serializer'`  | 'authenticator' => '%$RESTfulAPI_TokenAuthenticator', 'queryHandler' => '%$RESTfulAPI_DefaultQueryHandler', 'serializer' => '%$RESTfulAPI_BasicSerializer'
 `embedded_records` | `array` | key => value pairs sepcifying which relation names to embed in the response and for which model this applies (i.e. 'RequestedClass' => array('RelationNameToEmbed')) | n/a