Merge branch 'master' of https://github.com/Stormram/iDP-app

# By Stormram (5) and Robert (4)
# Via Stormram
* 'master' of https://github.com/Stormram/iDP-app:
  Update calculateClass.java
  Update calculateClassTest.java
  Update calculateClassTest.java
  Update Server.java
  Update Client.java
  no clue ...
  small test class added with JUnit test examples
  ...
  Added new Package with Client inside for app