update README.md and .gitignore

Author: datracka

.gitignore

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-node_modules
+node_modules
+.idea/

README.md

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-# angular.hamburg
+# react.angular.hamburg
 
-**The [angular.hamburg](https://angular.hamburg/) website for Hamburg's [Angular](https://angular.io/) [Meetup](https://www.meetup.com/Hamburg-AngularJS-Meetup/), jokingly made with [React](https://github.com/facebook/react).**
+**The [react.angular.hamburg](https://angular.hamburg/) website for Hamburg's [Angular](https://angular.io/) [Meetup](https://www.meetup.com/Hamburg-AngularJS-Meetup/), jokingly made with [React](https://github.com/facebook/react).**
 
 [![](https://raw.githubusercontent.com/angular-hamburg/angular.hamburg/master/docs/media/preview.png)](https://angular.hamburg/)