Add Google Collab script to visualize ethane example

[hexcreator]

I created a Python script to visualize ethane in 3D with rotation and zoom capabilities at https://colab.research.google.com/drive/1kHp3BUC7aPX-ELTDtQx2PPqBljUv3Opg. It showcases the power of this data structure and the simplicity of Python. Anyone can go to this link to see how simple it is to display molecules.