Merge remote-tracking branch 'origin/dev-flo' into develop

...aluation_scripts/beginner/exercise_4/exercise_4_1_eval.py

...aluation_scripts/beginner/exercise_4/exercise_4_2_eval.py

...aluation_scripts/beginner/exercise_5/exercise_5_1_eval.py

...aluation_scripts/beginner/exercise_5/exercise_5_2_eval.py

...aluation_scripts/beginner/exercise_5/exercise_5_3_eval.py

...ol/evaluation_scripts/controller/trajectory_controller.py

...l/solution_scripts/beginner/exercise_4/exercise_4_1.ipynb

...l/solution_scripts/beginner/exercise_4/exercise_4_2.ipynb

...l/solution_scripts/beginner/exercise_5/exercise_5_1.ipynb

...l/solution_scripts/beginner/exercise_5/exercise_5_2.ipynb

...l/solution_scripts/beginner/exercise_5/exercise_5_3.ipynb

...l/solution_scripts/beginner/exercise_6/exercise_6_1.ipynb

...l/solution_scripts/controller/trajectory_controller.ipynb

..._ws/src/learn_environment/task_pool/task_definitions.json