Have setup_repo take data interactively from the user to populate the README?

[sfirke]

It could be some Swirl-style interactive prompts to ensure that the README template is actually completed. These would be:

For the repo-level README:

• What other TNTP staff are involved in the project?
• Summary of the project:

For the subfolder-level README:

• What other TNTP staff are involved in the project? [don't ask if this is setup_repo and not setup_subdirectory)
• Purpose of the analysis:
• Other good-to-know context/info: [leave blank if unknown]