adds link to the "Angular-Buch" (PatrickJS#304)

JohannesHoppe · rolandjitsu · commit 25b8d942c57b · 2018-02-15T10:40:43.000+01:00
Adds a link to the website of our book. Many thanks for reviewing this.
Warning: I'm affiliated with the website. I wrote the book. 😇
diff --git a/README.md b/README.md
@@ -311,6 +311,7 @@ Http is available as an injectable class, with methods to perform http requests.
 * [揭秘Angular 2](https://www.amazon.cn/%E5%9B%BE%E4%B9%A6/dp/B01NBOQCJW) `GF Securities`
 * [Learn Angular 2](http://learnangular2.com/) `Ionic Team`
 * [Testing Angular Applications](https://www.manning.com/books/testing-angular-applications) `Manning Publications`
+* [Angular-Buch (German)](https://angular-buch.com/) `dpunkt.verlag`
 
 #### On-Site Training
 * [AngularClass](https://angularclass.com)
