Describe the bug
Three broken image links in DOCS.md. Result of a hasty merge on my part and I need to replace these with good illustrations (I don't have them yet). I also need to remove a text reference to something that doesn't exist (Seedy)

To Reproduce
Steps to reproduce the behavior:

1. Go to https://github.com/feiphoon/github-workshop/blob/master/DOCS.md
2. See broken images at "don't do this".

Expected behavior
These images need to be constructed and added.