Jekyll 3 compatibility.

Gemfile.lock

@@ -2,24 +2,26 @@ GEM
   remote: https://rubygems.org/
   specs:
     RedCloth (4.2.9)
-    activesupport (4.2.4)
+    activesupport (4.2.5.1)
       i18n (~> 0.7)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
     addressable (2.3.8)
     blankslate (2.1.2.4)
-    classifier-reborn (2.0.3)
+    classifier-reborn (2.0.4)
       fast-stemmer (~> 1.0)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
-    coffee-script-source (1.9.1.1)
+    coffee-script-source (1.10.0)
     colorator (0.1)
-    ethon (0.8.0)
+    ethon (0.8.1)
       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)
     gemoji (2.1.0)
@@ -42,7 +44,7 @@ GEM
       rdiscount (= 2.1.7)
       redcarpet (= 3.3.2)
       terminal-table (~> 1.4)
-    github-pages-health-check (0.5.3)
+    github-pages-health-check (0.6.0)
       addressable (~> 2.3)
       net-dns (~> 0.8)
       public_suffix (~> 1.4)
@@ -69,7 +71,8 @@ GEM
     jekyll-coffeescript (1.0.1)
       coffee-script (~> 2.2)
     jekyll-feed (0.3.1)
-    jekyll-gist (1.3.4)
+    jekyll-gist (1.4.0)
+      octokit (~> 4.2)
     jekyll-mentions (0.2.1)
       html-pipeline (~> 1.9.0)
       jekyll (~> 2.0)
@@ -79,7 +82,7 @@ GEM
     jekyll-sass-converter (1.3.0)
       sass (~> 3.2)
     jekyll-sitemap (0.8.1)
-    jekyll-watch (1.3.0)
+    jekyll-watch (1.3.1)
       listen (~> 3.0)
     jemoji (0.5.0)
       gemoji (~> 2.0)
@@ -88,30 +91,36 @@ GEM
     json (1.8.3)
     kramdown (1.5.0)
     liquid (2.6.2)
-    listen (3.0.3)
+    listen (3.0.5)
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9)
     maruku (0.7.0)
     mercenary (0.3.5)
-    mini_portile (0.6.2)
-    minitest (5.8.1)
+    mini_portile2 (2.0.0)
+    minitest (5.8.4)
+    multipart-post (2.0.0)
     net-dns (0.8.0)
-    nokogiri (1.6.6.2)
-      mini_portile (~> 0.6.0)
+    nokogiri (1.6.7.2)
+      mini_portile2 (~> 2.0.0.rc2)
+    octokit (4.2.0)
+      sawyer (~> 0.6.0, >= 0.5.3)
     parslet (1.5.0)
       blankslate (~> 2.0)
     posix-spawn (0.3.11)
-    public_suffix (1.5.1)
+    public_suffix (1.5.3)
     pygments.rb (0.6.3)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.2.0)
-    rb-fsevent (0.9.6)
+    rb-fsevent (0.9.7)
     rb-inotify (0.9.5)
       ffi (>= 0.5.0)
     rdiscount (2.1.7)
     redcarpet (3.3.2)
     safe_yaml (1.0.4)
-    sass (3.4.19)
+    sass (3.4.21)
+    sawyer (0.6.0)
+      addressable (~> 2.3.5)
+      faraday (~> 0.8, < 0.10)
     terminal-table (1.5.2)
     thread_safe (0.3.5)
     toml (0.1.2)
@@ -129,3 +138,6 @@ DEPENDENCIES
   github-pages (= 39)
   jekyll-mentions
   jekyll-sitemap
+
+BUNDLED WITH
+   1.10.6

_config.yml

@@ -11,8 +11,6 @@ exclude: [CNAME, README.md, .gitignore]
 permalink: / ## disables post output
 timezone: null
 lsi: false
-markdown: kramdown
-highlighter: pygments
 
 
 ### content configuration ###