EPA Scraper

I actually wrote this probably over a month ago, so unfortunately it's not completely fresh on my mind. I ran it and it seems to work. I'm not sure why I didn't turn it in immediately after it was finished, so apologies for that.

The part that seems the most onerous is the "topic areas". There are dozens of them, and the default command line options don't result in any reports getting downloaded, which seems like possibly a problem.