refactor data_points controller for modularity. add the 2nd docking animation
refactor 2nd docking js file for modularity. add graph and model description divs
change initial statue size in 2nd docking activity to half
refactor linear plot on 2nd docking js file for modularity
refactor polynomial plot on 2nd docking js file for modularity
adds 2nd docking model-chosing
finish 2nd docking. last commit before merging