Update 2016-01-26-jekyll-site-launched.md
Update 2016-01-26-jekyll-site-launched.md

added information about the tutorial I used.
pascalpoizat/pascalpoizat.github.io,freakonometrics/arthurcharpentier,freakonometrics/arthurcharpentier,freakonometrics/arthurcharpentier,pascalpoizat/pascalpoizat.github.io,freakonometrics/arthurcharpentier,pascalpoizat/pascalpoizat.github.io,pascalpoizat/pascalpoizat.github.io