Issue#127

Adapted  bricks to respect singular form of nouns if the related value requires it.

Jenkins Testruns: 
http://catrobatgw.ist.tugraz.at:8080/job/Catroid-single-UI-package-test/11/
http://catrobatgw.ist.tugraz.at:8080/job/Catroid-custom-branch-test/325/