Given a GitHub repository name and owner, download all the contributors' profile images and save them to a subdirectory, avatars/.

This program should be executed from the command line, in the following manner:

node download_avatars.js jquery jquery

As an open source project leader, I want a folder with the avatars of all of my github project's contributors so that I can use them in a website.

• I have node installed
• I am in the shell
• I have your file in my current folder

• I execute your file using node, providing a github user and repository as command-line arguments For example: $ node download_avatars.js nodejs node

• I should find a folder called avatars in my current directory
• The avatars folder should contain images corresponding to the avatars of the contributors of the repo
• The name of each image file should be the contributor's name and the file extension (ex. johnny.png)

• uses 'request' library to make the HTTP requests
• uses git for version control