Clone the source branch (master) into allplayers.github.com directory
git clone -b master git@github.com:AllPlayers/allplayers.github.com.git allplayers.github.com
You might need to install the jekyll gem. From the allplayers.github.com
directory run gem install jekyll
[EDIT] _posts/YYYY-MM-DD-Description.markdown
jekyll --server
Browse to http://localhost:3000
Make a PR from your local edit branch to "master" on allplayers.github.com.