default clipart or user-uploaded images

[mrjacobbloom]

This is probably pretty far out, but... for one of the tutorials, I wanna show how to use the image tag. But I'd rather the src be breadfish.gif than https://i.ytimg.com/vi/0RpdPzJgaBw/maxresdefault.jpg -- which means we either need a default image in the editor or a way for users to upload images.

[matthewr6]

Default images that we can do like a find-and-replace on or something