Manual installation of PyQt5, matplotlib, seaborn

[jackievaleri]

I needed to pip install PyQt5, matplotlib, and seaborn before using - not an issue for me, but it may be beneficial to update the documentation.

[Superzchen]

I suggest you to uninstall the python environment on your computer and install the Anaconda Python environment. The PyQt5, matplotlib, seaborn are internally installed in the Anaconda python environment. Please refer to Method1 in the README.md file for details.