Beginwk5

Hello, I added a lot of content to the README.md file. At first, I did most of the changes to the 'master' branch. Then I created a new branch called 'beginwk5' and it is this new branch I am making a pull request for. I thought it would be nice to add content to the README.md file.

I think this is one of my few pull requests -- maybe only my second or third? I am still learning git.

Thank you!

Bob Cochran
Greenbelt, Maryland, USA