Change images to be hosted, not local

[bschulz1701]

This repo is getting pretty huge (>500MB) due to the fact that most of the images we are using are simply kept locally in the images folder (taking full responsibility, this problem was started by me, @bschulz1701). This should change, either to automatic remote system (like GitHub LFS) or to simply hosting the images elsewhere (Google Photos, Imgur, etc) and change references to link over local based.