message: add Karen Geerts as contributor
diff: @@ -20,6 +20,9 @@ This repository is for anyone to create pull requests during Hacktoberfest 2018,
  ## Contributors List
  Start adding your names here:
  +- Karen Geerts. I work for REA (https://www.rea-group.com/IRM/content/default.aspx) and am a junior Ruby developer.
  + [![twitter-alt][twitter-img]](https://twitter.com/GeekRanters)
  + [![github-alt][github-img]](https://github.com/karengeerts)
  ### Example Profile
  - I'm an example that you can copy, if you want :)
  