[7] Adding s3 getters to the website scraping code

[beingkk]

Closes #7

Hi @helenCNode, you can merge this code and then download the scraped data by running these commands from the terminal

python dsp_nesta_brain/getters/nesta.py --download
python dsp_nesta_brain/getters/nesta.py --unzip

You can then use the following function to load the metadata table in Python

from dsp_nesta_brain.getters.nesta import load_metadata
metadata_df = load_metadata()

At the moment each website file is saved as a txt file. For further processing, you'd need to ingest it and use BeautifulSoup.
For example, you'll see that I've added a _scrape() function to your scrape module which is just the BeautifulSoup component of your scrape() function - and that could be used to go through all the txt files.

Hope this helps!

[beingkk]

Oh, and no need to review the s3 utils - they are copied from another project and have already been reviewed.