feat (outline): add support for @deferred mode. Fixes #917.

Author: gesinn-it-gea

src/Outline/OutlineResultPrinter.php

@@ -25,6 +25,15 @@ public function getName() {
 		return wfMessage( 'srf_printername_outline' )->text();
 	}
 
+	/**
+	 * @see ResultPrinter::isDeferrable
+	 *
+	 * {@inheritDoc}
+	 */
+	public function isDeferrable() {
+		return true;
+	}
+
 	/**
 	 * @see ResultPrinter::getParamDefinitions
 	 *