Corrected Pforzheim in Germany to be Hochschule

Due to changes in the German education system the „Fachhochschule
Pforzheim“ is now the „Hochschule Pforzheim“; due to this, the domain
also changed to [xxx]@hs-pforzheim.de
Merge pull request #58 from philipprottner/master

Corrected Pforzheim in Germany to be Hochschule