Updating Controller class to make it 100% compatible with new router system

$return->build() and $result->build() replaced by:

```php
       	$vars = Router::getControllerVars();
       	if( isset( $this->params['controller_method'] ) ) {
              $method = $this->params['controller_method'];
        } else {
              $method = 'build';
       }
       $return = call_user_func_array (array( $this, $method ) , $vars );
```