devel: Added 4PRUS robotic model

The geometric parameter still need to be fixed
devel: Added 3PRUS robotic model
devel: Added 3PUPS robotic model
devel: Renamed temp. variable to n
fix: Fixed cross product calculations within robotic models
devel: Reduced number of comparisions within the lipschitz analysis
devel: Deleted copy constructor
devel: Initialised lipschitz constant (no sweet cake for coverity_scan)
devel: Added new models