New package across important branches

[LTR14]

Source: From main branch going to read-in-spreadsheet branch (or other branches with updated requirement lists)

Description: If the code for the main branch is already on your machine and you switch into the read-in-spreadsheet branch, you will either have to manually pip install the following packages: googledrivedownloader. requests, pathlib, openpyxl. These can be found at PPUC/requirements.txt

Solution: Either rerun the requirements download from the root directory (g2a/PPUC) with pip3 install -r requirements.txt on Mac or pip install -r requirements.txt on Windows. This can also be down manually as mentioned above