Update README.md

Author: matt-sanders

README.md

@@ -11,4 +11,9 @@ Or via a script
 <script src="your_dir/vue-formly/vue-formly.min.js"></script>
 ```
 ## Usage
-Take a look at the [docs](https://www.gitbook.com/book/matt-sanders/vue-formly/details) for extended information about using Formly and creating custom input types.
+Take a look at the [docs](https://www.gitbook.com/book/matt-sanders/vue-formly/details) for extended information about using Formly and creating custom input types.
+
+## To Do
+* [ ] Implement validation
+* [ ] Better error handling
+* [ ] Simplified data access