allow reading in directly from google sheet

[ageller]

Currently we need to make additional csv files, but since we're working in Colab, we should be able to read in directly from the Google Sheet. I suppose we will still have to edit the sheet to make sure it conforms to the necessary format (e.g., with names from preferences) -- though maybe that will be fixed when we implement dropdowns for preferences.

The other main thing that we'll need to improve to streamline is to have the name_list.csv file read in from Kari's file. (Currently we need to generate it ourselves).

[ageller]

This works in the colab notebook on Drive. Once we have the names list from Kari, we can read that instead of having to generate the list. After that we can close this issue.

[agurvich]

will also need to update input reader to look for the new preference columns, parse commas vs.. semi-colons, etc... will need a test dataset

[agurvich]

f80931c brings us half-way there. Now just need to point Python code to the new namelist.csv. After that, will need to submit the updated survey a couple of times to get the format right with the new column ordering.