Add missing Gemfile
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..587c0ac
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,7 @@
+source 'https://rubygems.org'
+gem 'github-pages'
+gem 'rouge'
+gem 'jekyll-paginate'
+gem 'jekyll-feed'
+gem 'jekyll-gist'
+gem 'jekyll-oembed', :require => 'jekyll_oembed'