Add jekyll-sitemap to list of gem dependencies
Add jekyll-sitemap to list of gem dependencies

Let's allow users to easily generate sitemaps on GitHub Pages! Imagine how useful this is for documentation sites :smiley:
mstred/pages-gem,jlord/pages-gem,mstred/pages-gem,Stargator/pages-gem,github/pages-gem,jlord/pages-gem,github/pages-gem,n060dyz/pages-gem,n060dyz/pages-gem,JustinPatenaude/pages-gem,JustinPatenaude/pages-gem,Stargator/pages-gem