Added opton to add a List via the command method

src/main/java/rife/bld/extension/ExecOperation.java

@@ -54,6 +54,16 @@ public class ExecOperation extends AbstractOperation<ExecOperation> {
         return this;
     }
 
+    /**
+     * Configures the command and arguments to be executed.
+     *
+     * @see #command(String...)
+     */
+    public ExecOperation command(List<String> args) {
+        args_.addAll(args);
+        return this;
+    }
+
     /**
      * Executes the command.
      */