Added support for Multiple @SWG\Operation() inside a @SWG\Operations

Fixes an issue which caused Swagger to generate an array in an array:
{ path: "/users", operations: [ [ { nickname:"index", … } ] ] }
Instead of the correct:
{ path: "/users", operations: [ { nickname:"index", … } ] }


Example docblock:
```php
/**
 * @SWG\Api(
 *   path="/users",
 *   @SWG\Operations(
 *     @SWG\Operation(
 *       nickname="index",
 *       summary="Retrieve all users",
 *       httpMethod="GET",
 *       responseClass="User"
 *     ),
 *     @SWG\Operation(
 *       nickname="index",
 *       summary="Create user",
 *       httpMethod="POST",
 *       responseClass="User",
 *       @SWG\Parameter(name="email",dataType="String"),
 *       @SWG\Parameter(name="phone",dataType="String")
 *     )
 *   )
 * )
 */
function index() {
}
```