diff --git a/Gemfile.lock b/Gemfile.lock
index b46f4bf..59b37f7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,19 +9,27 @@ GEM
       tzinfo (~> 1.1)
     addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
-    chunky_png (1.3.4)
+    base64 (0.3.0)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
     colorator (1.1.0)
-    compass (0.12.5)
-      chunky_png (~> 1.2)
-      fssm (>= 0.2.7)
-      sass (~> 3.2.19)
+    commonmarker (0.23.12)
     concurrent-ruby (1.0.5)
-    ethon (0.15.0)
+    csv (3.3.5)
+    dnsruby (1.73.1)
+      base64 (>= 0.2)
+      logger (~> 1.6)
+      simpleidn (~> 0.2.1)
+    em-websocket (0.5.3)
+      eventmachine (>= 0.12.9)
+      http_parser.rb (~> 0)
+    ethon (0.18.0)
       ffi (>= 1.15.0)
+      logger
+    eventmachine (1.2.7)
+    eventmachine (1.2.7-x86-mingw32)
     execjs (2.7.0)
     faraday (1.9.3)
       faraday-em_http (~> 1.0)
@@ -49,188 +57,235 @@ GEM
     ffi (1.15.5)
     ffi (1.15.5-x86-mingw32)
     forwardable-extended (2.6.0)
-    fssm (0.2.10)
-    gemoji (2.1.0)
-    github-pages (116)
-      activesupport (= 4.2.7)
-      github-pages-health-check (= 1.3.0)
-      jekyll (= 3.3.1)
-      jekyll-avatar (= 0.4.2)
-      jekyll-coffeescript (= 1.0.1)
-      jekyll-default-layout (= 0.1.4)
-      jekyll-feed (= 0.8.0)
-      jekyll-gist (= 1.4.0)
-      jekyll-github-metadata (= 2.3.1)
-      jekyll-mentions (= 1.2.0)
-      jekyll-optional-front-matter (= 0.1.2)
+    gemoji (4.1.0)
+    github-pages (232)
+      github-pages-health-check (= 1.18.2)
+      jekyll (= 3.10.0)
+      jekyll-avatar (= 0.8.0)
+      jekyll-coffeescript (= 1.2.2)
+      jekyll-commonmark-ghpages (= 0.5.1)
+      jekyll-default-layout (= 0.1.5)
+      jekyll-feed (= 0.17.0)
+      jekyll-gist (= 1.5.0)
+      jekyll-github-metadata (= 2.16.1)
+      jekyll-include-cache (= 0.2.1)
+      jekyll-mentions (= 1.6.0)
+      jekyll-optional-front-matter (= 0.3.2)
       jekyll-paginate (= 1.1.0)
-      jekyll-readme-index (= 0.0.3)
-      jekyll-redirect-from (= 0.11.0)
-      jekyll-relative-links (= 0.2.1)
-      jekyll-sass-converter (= 1.3.0)
-      jekyll-seo-tag (= 2.1.0)
-      jekyll-sitemap (= 0.12.0)
-      jekyll-swiss (= 0.4.0)
-      jekyll-theme-architect (= 0.0.3)
-      jekyll-theme-cayman (= 0.0.3)
-      jekyll-theme-dinky (= 0.0.3)
-      jekyll-theme-hacker (= 0.0.3)
-      jekyll-theme-leap-day (= 0.0.3)
-      jekyll-theme-merlot (= 0.0.3)
-      jekyll-theme-midnight (= 0.0.3)
-      jekyll-theme-minimal (= 0.0.3)
-      jekyll-theme-modernist (= 0.0.3)
-      jekyll-theme-primer (= 0.1.7)
-      jekyll-theme-slate (= 0.0.3)
-      jekyll-theme-tactile (= 0.0.3)
-      jekyll-theme-time-machine (= 0.0.3)
-      jekyll-titles-from-headings (= 0.1.4)
-      jemoji (= 0.7.0)
-      kramdown (= 1.11.1)
-      liquid (= 3.0.6)
-      listen (= 3.0.6)
+      jekyll-readme-index (= 0.3.0)
+      jekyll-redirect-from (= 0.16.0)
+      jekyll-relative-links (= 0.6.1)
+      jekyll-remote-theme (= 0.4.3)
+      jekyll-sass-converter (= 1.5.2)
+      jekyll-seo-tag (= 2.8.0)
+      jekyll-sitemap (= 1.4.0)
+      jekyll-swiss (= 1.0.0)
+      jekyll-theme-architect (= 0.2.0)
+      jekyll-theme-cayman (= 0.2.0)
+      jekyll-theme-dinky (= 0.2.0)
+      jekyll-theme-hacker (= 0.2.0)
+      jekyll-theme-leap-day (= 0.2.0)
+      jekyll-theme-merlot (= 0.2.0)
+      jekyll-theme-midnight (= 0.2.0)
+      jekyll-theme-minimal (= 0.2.0)
+      jekyll-theme-modernist (= 0.2.0)
+      jekyll-theme-primer (= 0.6.0)
+      jekyll-theme-slate (= 0.2.0)
+      jekyll-theme-tactile (= 0.2.0)
+      jekyll-theme-time-machine (= 0.2.0)
+      jekyll-titles-from-headings (= 0.5.3)
+      jemoji (= 0.13.0)
+      kramdown (= 2.4.0)
+      kramdown-parser-gfm (= 1.1.0)
+      liquid (= 4.0.4)
       mercenary (~> 0.3)
-      minima (= 2.0.0)
-      nokogiri (= 1.6.8.1)
-      rouge (= 1.11.1)
+      minima (= 2.5.1)
+      nokogiri (>= 1.16.2, < 2.0)
+      rouge (= 3.30.0)
       terminal-table (~> 1.4)
-    github-pages-health-check (1.3.0)
+      webrick (~> 1.8)
+    github-pages-health-check (1.18.2)
       addressable (~> 2.3)
-      net-dns (~> 0.8)
-      octokit (~> 4.0)
-      public_suffix (~> 2.0)
-      typhoeus (~> 0.7)
+      dnsruby (~> 1.60)
+      octokit (>= 4, < 8)
+      public_suffix (>= 3.0, < 6.0)
+      typhoeus (~> 1.3)
     html-pipeline (2.7.1)
       activesupport (>= 2)
       nokogiri (>= 1.4)
+    http_parser.rb (0.8.1)
     i18n (0.9.1)
       concurrent-ruby (~> 1.0)
-    jekyll (3.3.1)
+    jekyll (3.10.0)
       addressable (~> 2.4)
       colorator (~> 1.0)
+      csv (~> 3.0)
+      em-websocket (~> 0.5)
+      i18n (>= 0.7, < 2)
       jekyll-sass-converter (~> 1.0)
-      jekyll-watch (~> 1.1)
-      kramdown (~> 1.3)
-      liquid (~> 3.0)
+      jekyll-watch (~> 2.0)
+      kramdown (>= 1.17, < 3)
+      liquid (~> 4.0)
       mercenary (~> 0.3.3)
       pathutil (~> 0.9)
-      rouge (~> 1.7)
+      rouge (>= 1.7, < 4)
       safe_yaml (~> 1.0)
-    jekyll-avatar (0.4.2)
-      jekyll (~> 3.0)
-    jekyll-coffeescript (1.0.1)
+      webrick (>= 1.0)
+    jekyll-avatar (0.8.0)
+      jekyll (>= 3.0, < 5.0)
+    jekyll-coffeescript (1.2.2)
       coffee-script (~> 2.2)
-    jekyll-default-layout (0.1.4)
-      jekyll (~> 3.0)
-    jekyll-feed (0.8.0)
-      jekyll (~> 3.3)
-    jekyll-gist (1.4.0)
+      coffee-script-source (~> 1.12)
+    jekyll-commonmark (1.4.0)
+      commonmarker (~> 0.22)
+    jekyll-commonmark-ghpages (0.5.1)
+      commonmarker (>= 0.23.7, < 1.1.0)
+      jekyll (>= 3.9, < 4.0)
+      jekyll-commonmark (~> 1.4.0)
+      rouge (>= 2.0, < 5.0)
+    jekyll-default-layout (0.1.5)
+      jekyll (>= 3.0, < 5.0)
+    jekyll-feed (0.17.0)
+      jekyll (>= 3.7, < 5.0)
+    jekyll-gist (1.5.0)
       octokit (~> 4.2)
-    jekyll-github-metadata (2.3.1)
-      jekyll (~> 3.1)
-      octokit (~> 4.0, != 4.4.0)
-    jekyll-mentions (1.2.0)
-      activesupport (~> 4.0)
+    jekyll-github-metadata (2.16.1)
+      jekyll (>= 3.4, < 5.0)
+      octokit (>= 4, < 7, != 4.4.0)
+    jekyll-include-cache (0.2.1)
+      jekyll (>= 3.7, < 5.0)
+    jekyll-mentions (1.6.0)
       html-pipeline (~> 2.3)
-      jekyll (~> 3.0)
-    jekyll-optional-front-matter (0.1.2)
-      jekyll (~> 3.0)
+      jekyll (>= 3.7, < 5.0)
+    jekyll-optional-front-matter (0.3.2)
+      jekyll (>= 3.0, < 5.0)
     jekyll-paginate (1.1.0)
-    jekyll-readme-index (0.0.3)
-      jekyll (~> 3.0)
-    jekyll-redirect-from (0.11.0)
-      jekyll (>= 2.0)
-    jekyll-relative-links (0.2.1)
-      jekyll (~> 3.3)
-    jekyll-sass-converter (1.3.0)
-      sass (~> 3.2)
-    jekyll-seo-tag (2.1.0)
-      jekyll (~> 3.3)
-    jekyll-sitemap (0.12.0)
-      jekyll (~> 3.3)
-    jekyll-swiss (0.4.0)
-    jekyll-theme-architect (0.0.3)
-      jekyll (~> 3.3)
-    jekyll-theme-cayman (0.0.3)
-      jekyll (~> 3.3)
-    jekyll-theme-dinky (0.0.3)
-      jekyll (~> 3.3)
-    jekyll-theme-hacker (0.0.3)
-      jekyll (~> 3.3)
-    jekyll-theme-leap-day (0.0.3)
-      jekyll (~> 3.3)
-    jekyll-theme-merlot (0.0.3)
-      jekyll (~> 3.3)
-    jekyll-theme-midnight (0.0.3)
-      jekyll (~> 3.3)
-    jekyll-theme-minimal (0.0.3)
-      jekyll (~> 3.3)
-    jekyll-theme-modernist (0.0.3)
-      jekyll (~> 3.3)
-    jekyll-theme-primer (0.1.7)
-      jekyll (~> 3.3)
-    jekyll-theme-slate (0.0.3)
-      jekyll (~> 3.3)
-    jekyll-theme-tactile (0.0.3)
-      jekyll (~> 3.3)
-    jekyll-theme-time-machine (0.0.3)
-      jekyll (~> 3.3)
-    jekyll-titles-from-headings (0.1.4)
-      jekyll (~> 3.3)
-    jekyll-watch (1.5.1)
+    jekyll-readme-index (0.3.0)
+      jekyll (>= 3.0, < 5.0)
+    jekyll-redirect-from (0.16.0)
+      jekyll (>= 3.3, < 5.0)
+    jekyll-relative-links (0.6.1)
+      jekyll (>= 3.3, < 5.0)
+    jekyll-remote-theme (0.4.3)
+      addressable (~> 2.0)
+      jekyll (>= 3.5, < 5.0)
+      jekyll-sass-converter (>= 1.0, <= 3.0.0, != 2.0.0)
+      rubyzip (>= 1.3.0, < 3.0)
+    jekyll-sass-converter (1.5.2)
+      sass (~> 3.4)
+    jekyll-seo-tag (2.8.0)
+      jekyll (>= 3.8, < 5.0)
+    jekyll-sitemap (1.4.0)
+      jekyll (>= 3.7, < 5.0)
+    jekyll-swiss (1.0.0)
+    jekyll-theme-architect (0.2.0)
+      jekyll (> 3.5, < 5.0)
+      jekyll-seo-tag (~> 2.0)
+    jekyll-theme-cayman (0.2.0)
+      jekyll (> 3.5, < 5.0)
+      jekyll-seo-tag (~> 2.0)
+    jekyll-theme-dinky (0.2.0)
+      jekyll (> 3.5, < 5.0)
+      jekyll-seo-tag (~> 2.0)
+    jekyll-theme-hacker (0.2.0)
+      jekyll (> 3.5, < 5.0)
+      jekyll-seo-tag (~> 2.0)
+    jekyll-theme-leap-day (0.2.0)
+      jekyll (> 3.5, < 5.0)
+      jekyll-seo-tag (~> 2.0)
+    jekyll-theme-merlot (0.2.0)
+      jekyll (> 3.5, < 5.0)
+      jekyll-seo-tag (~> 2.0)
+    jekyll-theme-midnight (0.2.0)
+      jekyll (> 3.5, < 5.0)
+      jekyll-seo-tag (~> 2.0)
+    jekyll-theme-minimal (0.2.0)
+      jekyll (> 3.5, < 5.0)
+      jekyll-seo-tag (~> 2.0)
+    jekyll-theme-modernist (0.2.0)
+      jekyll (> 3.5, < 5.0)
+      jekyll-seo-tag (~> 2.0)
+    jekyll-theme-primer (0.6.0)
+      jekyll (> 3.5, < 5.0)
+      jekyll-github-metadata (~> 2.9)
+      jekyll-seo-tag (~> 2.0)
+    jekyll-theme-slate (0.2.0)
+      jekyll (> 3.5, < 5.0)
+      jekyll-seo-tag (~> 2.0)
+    jekyll-theme-tactile (0.2.0)
+      jekyll (> 3.5, < 5.0)
+      jekyll-seo-tag (~> 2.0)
+    jekyll-theme-time-machine (0.2.0)
+      jekyll (> 3.5, < 5.0)
+      jekyll-seo-tag (~> 2.0)
+    jekyll-titles-from-headings (0.5.3)
+      jekyll (>= 3.3, < 5.0)
+    jekyll-watch (2.2.1)
       listen (~> 3.0)
-    jemoji (0.7.0)
-      activesupport (~> 4.0)
-      gemoji (~> 2.0)
+    jemoji (0.13.0)
+      gemoji (>= 3, < 5)
       html-pipeline (~> 2.2)
-      jekyll (>= 3.0)
+      jekyll (>= 3.0, < 5.0)
     json (1.8.6)
-    kramdown (1.11.1)
-    liquid (3.0.6)
+    kramdown (2.4.0)
+      rexml
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
+    liquid (4.0.4)
     listen (3.0.6)
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9.7)
+    logger (1.7.0)
     mercenary (0.3.6)
-    mini_portile2 (2.1.0)
-    minima (2.0.0)
+    mini_portile2 (2.8.9)
+    minima (2.5.1)
+      jekyll (>= 3.5, < 5.0)
+      jekyll-feed (~> 0.9)
+      jekyll-seo-tag (~> 2.1)
     minitest (5.10.3)
     multipart-post (2.1.1)
-    net-dns (0.9.0)
-    nokogiri (1.6.8.1)
-      mini_portile2 (~> 2.1.0)
-    nokogiri (1.6.8.1-x86-mingw32)
-      mini_portile2 (~> 2.1.0)
+    nokogiri (1.19.1)
+      mini_portile2 (~> 2.8.2)
+      racc (~> 1.4)
     octokit (4.22.0)
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (2.0.5)
+    public_suffix (4.0.7)
+    racc (1.8.1)
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rouge (1.11.1)
+    rexml (3.4.4)
+    rouge (3.30.0)
     ruby2_keywords (0.0.5)
+    rubyzip (2.4.1)
     safe_yaml (1.0.5)
-    sass (3.2.19)
+    sass (3.7.4)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
     sawyer (0.8.2)
       addressable (>= 2.3.5)
       faraday (> 0.8, < 2.0)
+    simpleidn (0.2.3)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     thread_safe (0.3.6)
-    typhoeus (0.8.0)
-      ethon (>= 0.8.0)
+    typhoeus (1.6.0)
+      ethon (>= 0.18.0)
     tzinfo (1.2.10)
       thread_safe (~> 0.1)
     unicode-display_width (1.3.0)
+    webrick (1.9.2)
 
 PLATFORMS
   ruby
   x86-mingw32
 
 DEPENDENCIES
-  compass (= 0.12.5)
   github-pages
   jekyll-sitemap