Set up Blog posts so that they can be edited in Github by visitors

[32bpwr3]

I'd like to adjust the template for blog posts so that a link labeled "Edit in Github" is displayed. More information can be found here:

http://horrorzine.gazerbeam.com/wp-admin/plugin-install.php?tab=plugin-information&plugin=wp-github-sync&TB_iframe=true&width=600&height=550

https://github.com/mAAdhaTTah/wordpress-github-sync#add-editview-on-github-link