message: add real world example
diff: @@ -114,3 +114,5 @@ Every contribution is welcome. Please checkout the [CONTRIBUTION.md](https://git
  If you need a working example for the current angular-cli with the current angular-mdl and angular versions please have a look at:
  [https://github.com/mseemann/angular-mdl-a4-angular-cli](https://github.com/mseemann/angular-mdl-a4-angular-cli).
  +
  +And if you would like to see a real world app that uses this package have a look at https://www.yovelino.de/apps/tour-planner/.
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