Merge branch 'ngreen14-patch-2' into gh-pages. Closes #64

_data/course.yml

@@ -127,3 +127,7 @@ signups:
    image: http://www.gravatar.com/avatar/55f1d1ffbca0d409d46c48ffe5b08fb5.png
    twitter: mcmorgan
    github: mcmorgan53
+ - name: Natalie Green
+   image: https://pbs.twimg.com/profile_images/547838860005093377/B4RlxXCN.jpeg
+   twitter: natalieg92
+   github: ngreen14