added diskusage package

Author: ChristophBodenstein

TOEDistributionServer/src/node/tns/package.json

@@ -19,6 +19,7 @@
 	"mkdirp": "*",
     "graceful-fs": "*",
 	"rimraf": "*",
-	"glob": "*"
+	"glob": "*",
+	"diskusage": "*"
   }
-}
+}