Update README.md

SilverFire · web-flow · commit f66d08f2b8f6 · 2016-12-20T08:35:45.000+02:00
diff --git a/README.md b/README.md
@@ -110,9 +110,9 @@ See the [code style guide](https://github.com/yiisoft/yii2/blob/master/docs/inte
 Creating your own templates
 ---------------------------
 
-TDB
+TBD
 
 Using the model layer
 ---------------------
 
-TDB
+TBD
