Create image upload process

[dchiller]

Create an image upload process that supports PNG images

[ahankinson]

Will images stored elsewhere on the internet be allowed? Can I provide a URL to an image on the internet archive or Wikimedia commons instead of uploading an image?

[fujinaga]

Yes, as long as the images are in the public domain, in fact, Dylan had suggested that we may store the images on IA or Wikimedia (see #15).