Added car create
Added car create, pasted in functions from python version to see how to incorporate, renamed sim.ipynb to python_sim.ipynb, renamed sim2.ipynb to sim.ipynb, removed old_sim.ipynb
Added car create, pasted in functions from python version to see how to incorporate, renamed sim.ipynb to python_sim.ipynb, renamed sim2.ipynb to sim.ipynb, removed old_sim.ipynb