Merge pull request #342 from github/jekyll3-tests-cleanup

Fix #341 tests that broke post Jekyll 3 upgrade

Rakefile

@@ -11,6 +11,7 @@ task :test do
   sh "bundle exec jekyll build --trace"
   Rake::Task["spec"].invoke
   HTML::Proofer.new("./_site", :check_html => true,
+                    :validation => { :ignore_script_embeds => true },
                     :href_swap => { %r{http://choosealicense.com} => "" }).run
 end
 

_config.yml

@@ -41,6 +41,7 @@ gems:
   - jekyll-sitemap
   - jekyll-redirect-from
   - jekyll-seo-tag
+  - jekyll-coffeescript
 
 sass:
     sass_dir: _sass