Added Python Translation to R Script

[admiralorbiter]

I hope this message finds you well. My name is Jon Lane (@admiralorbiter), and I have been using your R script for batch downloading IPEDS files. It has been incredibly helpful, and I appreciate the effort you've put into creating it.

For my project, I needed to convert your script into python and thought it might be useful to include.

Summary of Changes:

• Added downloadipeds.py: This is a direct translation of the downloadipeds.R script into Python. The functionality remains the same, allowing users to batch download IPEDS files as specified in ipeds_file_list.txt.
• Updated README.md: Reflects the option to use either the R script or the Python script, including instructions for both. I have ensured that the Python script matches the structure and comments of the original R script as closely as possible for consistency. I hope this contribution aligns with your vision for the project.

Thank you for considering this contribution. I look forward to any feedback you may have.