It appears that recent changes to GitHub don't allow for referencing to GitHub hosted images from within Markdown files. If you look at the JS Console Log on the page https://github.com/overtone/emacs-live , you will see:
emacs-live:1 Refused to load the image 'http://github.com/downloads/overtone/emacs-live/emacs-live.png' because it violates the following Content Security Policy directive: "img-src 'self' data: assets-cdn.github.com identicons.github.com www.google-analytics.com collector.githubapp.com *.gravatar.com *.wp.com *.githubusercontent.com".
emacs-live:1 Refused to load the image 'https://cloud.github.com/downloads/overtone/live-coding-emacs/live-coding-config-in-use.png' because it violates the following Content Security Policy directive: "img-src 'self' data: assets-cdn.github.com identicons.github.com www.google-analytics.com collector.githubapp.com *.gravatar.com *.wp.com *.githubusercontent.com".
emacs-live:1 Refused to load the image 'https://cloud.github.com/downloads/overtone/live-coding-emacs/live-coding-config-in-use-2.png' because it violates the following Content Security Policy directive: "img-src 'self' data: assets-cdn.github.com identicons.github.com www.google-analytics.com collector.githubapp.com *.gravatar.com *.wp.com *.githubusercontent.com".
It appears that recent changes to GitHub don't allow for referencing to GitHub hosted images from within Markdown files. If you look at the JS Console Log on the page https://github.com/overtone/emacs-live , you will see:
So I am proposing to move the screenshots to the repository. You can see that this actually works over at my cloned repo: https://github.com/valera-rozuvan/emacs-live .