A simple extension to make link-blogging to a Github-hosted Jekyll blog easy.
Install it from the Chrome WebStore: https://chrome.google.com/webstore/detail/serum/ffboflhdigfmnnokjjcmfipgehggjhlj
Just select the text you want to quote, click the toolbar button and make any necessary tweaks to the post and the new post file is added to the _drafts
directory of your Jekyll blog on Github.