added commands support

src/client/action/settings.js

@@ -0,0 +1,12 @@
+import appDispatcher from '../dispatcher';
+import cons from '../state/cons';
+
+function toggleMarkdown() {
+  appDispatcher.dispatch({
+    type: cons.actions.settings.TOGGLE_MARKDOWN,
+  });
+}
+
+export {
+  toggleMarkdown,
+};