Upgrade Jekyll to 3.3.1

Gemfile

@@ -1,4 +1,4 @@
 source 'https://rubygems.org'
-gem 'jekyll', '2.4.0'
+gem 'jekyll', '3.3.1'
 gem 'therubyracer'
 gem 'html-proofer'

Gemfile.lock

@@ -6,24 +6,15 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.3.8)
-    blankslate (2.1.2.4)
-    classifier-reborn (2.0.4)
-      fast-stemmer (~> 1.0)
-    coffee-script (2.4.1)
-      coffee-script-source
-      execjs
-    coffee-script-source (1.10.0)
-    colorator (0.1)
+    addressable (2.5.0)
+      public_suffix (~> 2.0, >= 2.0.2)
+    colorator (1.1.0)
     colored (1.2)
     concurrent-ruby (1.0.4)
     ethon (0.10.1)
       ffi (>= 1.3.0)
-    execjs (2.6.0)
-    faraday (0.9.2)
-      multipart-post (>= 1.2, < 3)
-    fast-stemmer (1.0.2)
-    ffi (1.9.10)
+    ffi (1.9.14)
+    forwardable-extended (2.6.0)
     html-proofer (3.4.0)
       activesupport (>= 4.2, < 6.0)
       addressable (~> 2.3)
@@ -34,80 +25,59 @@ GEM
       typhoeus (~> 0.7)
       yell (~> 2.0)
     i18n (0.7.0)
-    jekyll (2.4.0)
-      classifier-reborn (~> 2.0)
-      colorator (~> 0.1)
-      jekyll-coffeescript (~> 1.0)
-      jekyll-gist (~> 1.0)
-      jekyll-paginate (~> 1.0)
+    jekyll (3.3.1)
+      addressable (~> 2.4)
+      colorator (~> 1.0)
       jekyll-sass-converter (~> 1.0)
       jekyll-watch (~> 1.1)
       kramdown (~> 1.3)
-      liquid (~> 2.6.1)
+      liquid (~> 3.0)
       mercenary (~> 0.3.3)
-      pygments.rb (~> 0.6.0)
-      redcarpet (~> 3.1)
+      pathutil (~> 0.9)
+      rouge (~> 1.7)
       safe_yaml (~> 1.0)
-      toml (~> 0.1.0)
-    jekyll-coffeescript (1.0.1)
-      coffee-script (~> 2.2)
-    jekyll-gist (1.4.0)
-      octokit (~> 4.2)
-    jekyll-paginate (1.1.0)
-    jekyll-sass-converter (1.3.0)
-      sass (~> 3.2)
-    jekyll-watch (1.3.1)
-      listen (~> 3.0)
-    kramdown (1.9.0)
-    libv8 (3.16.14.11)
-    liquid (2.6.2)
-    listen (3.0.5)
-      rb-fsevent (>= 0.9.3)
-      rb-inotify (>= 0.9)
-    mercenary (0.3.5)
+    jekyll-sass-converter (1.5.0)
+      sass (~> 3.4)
+    jekyll-watch (1.5.0)
+      listen (~> 3.0, < 3.1)
+    kramdown (1.13.1)
+    libv8 (3.16.14.17)
+    liquid (3.0.6)
+    listen (3.0.8)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
+    mercenary (0.3.6)
     mini_portile2 (2.1.0)
     minitest (5.10.1)
-    multipart-post (2.0.0)
-    nokogiri (1.7.0)
+    nokogiri (1.7.0.1)
       mini_portile2 (~> 2.1.0)
-    octokit (4.2.0)
-      sawyer (~> 0.6.0, >= 0.5.3)
     parallel (1.10.0)
-    parslet (1.5.0)
-      blankslate (~> 2.0)
-    posix-spawn (0.3.11)
-    pygments.rb (0.6.3)
-      posix-spawn (~> 0.3.6)
-      yajl-ruby (~> 1.2.0)
-    rb-fsevent (0.9.7)
-    rb-inotify (0.9.5)
+    pathutil (0.14.0)
+      forwardable-extended (~> 2.6)
+    public_suffix (2.0.5)
+    rb-fsevent (0.9.8)
+    rb-inotify (0.9.7)
       ffi (>= 0.5.0)
-    redcarpet (3.3.3)
     ref (2.0.0)
+    rouge (1.11.1)
     safe_yaml (1.0.4)
-    sass (3.4.21)
-    sawyer (0.6.0)
-      addressable (~> 2.3.5)
-      faraday (~> 0.8, < 0.10)
-    therubyracer (0.12.2)
-      libv8 (~> 3.16.14.0)
+    sass (3.4.23)
+    therubyracer (0.12.3)
+      libv8 (~> 3.16.14.15)
       ref
     thread_safe (0.3.5)
-    toml (0.1.2)
-      parslet (~> 1.5.0)
     typhoeus (0.8.0)
       ethon (>= 0.8.0)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
-    yajl-ruby (1.2.1)
     yell (2.0.7)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   html-proofer
-  jekyll (= 2.4.0)
+  jekyll (= 3.3.1)
   therubyracer
 
 BUNDLED WITH

README.md

@@ -19,18 +19,25 @@ provided by GitHub.
 
 A tldr version follows:
 
-* First time contributor to this site? Ensure you have Ruby and bundler
-  installed, and then run `bundle install`
-* Create a branch.
-* Make your changes.
-* To test your changes, run `bundle exec jekyll serve` (or
-  `jekyll serve -w --force_polling`)
-* Prior to submitting, run automatic link validation:
-
-  ```
-  bundle exec jekyll build
-  bundle exec htmlproofer --empty-alt-ignore _site --url-ignore "#"
-  ```
+1. Ensure you have [Ruby](https://www.ruby-lang.org/en/documentation/installation/) installed; you need version 2.3.1 or later:<br>
+`ruby --version`
+
+1. Ensure you have [Bundler](http://bundler.io/) installed; if not install with:<br>
+`sudo gem install bundler`
+
+1. Install all dependencies:<br>
+`bundle install`
+
+1. Create a branch.
+
+1. Make your changes.
+
+1. Test your changes by serving the site locally:<br>
+`bundle exec jekyll serve` (or `jekyll serve -w --force_polling`)
+
+1. Prior to submitting, run link validation:<br>
+`bundle exec jekyll build`<br>
+`bundle exec htmlproofer --empty-alt-ignore _site --url-ignore "#"`
 
 ## Code Snippet Validation