This works for printing Github Markdown with images !
Steps:
1. Download raw .md file, having embedded links to images and copy its contents
2. Modify image links in file with following:
Find Regex: https://github.com/(.*)/blob/(.*)
Replace: https://raw.githubusercontent.com/$1/$2
3. Paste at 'markdownprint' site
4. Generate HTML page
5. Use browser print to save as PDF
S. Janzen, W. Maass, und T. Kowatsch. Proceedings of 54th Annual Meeting of the Association for Computational Linguistics (ACL 2016), Seite 547--557. The Association for Computer Linguistics, (August 2016)