Bump Ruby and gems to match github pages

.ruby-version

@@ -1 +1 @@
-ruby-2.1.0
+ruby-2.1.2

Gemfile

@@ -1,6 +1,5 @@
 source 'https://rubygems.org'
 
-ruby '2.1.0'
+ruby '2.1.2'
 
-gem 'jekyll', '~> 1.4.1'
-gem 'redcarpet', '~> 2.3.0'
+gem 'github-pages'

Gemfile.lock

@@ -1,52 +1,96 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    RedCloth (4.2.9)
+    activesupport (4.1.4)
+      i18n (~> 0.6, >= 0.6.9)
+      json (~> 1.7, >= 1.7.7)
+      minitest (~> 5.1)
+      thread_safe (~> 0.1)
+      tzinfo (~> 1.1)
     blankslate (2.1.2.4)
-    classifier (1.3.3)
+    classifier (1.3.4)
       fast-stemmer (>= 1.0.0)
     colorator (0.1)
-    commander (4.1.5)
+    commander (4.1.6)
       highline (~> 1.6.11)
     fast-stemmer (1.0.2)
     ffi (1.9.3)
-    highline (1.6.20)
-    jekyll (1.4.1)
+    gemoji (1.5.0)
+    github-pages (20)
+      RedCloth (= 4.2.9)
+      jekyll (= 1.5.1)
+      jekyll-mentions (= 0.0.9)
+      jekyll-redirect-from (= 0.3.1)
+      jekyll-sitemap (= 0.3.0)
+      jemoji (= 0.1.0)
+      kramdown (= 1.3.1)
+      liquid (= 2.5.5)
+      maruku (= 0.7.0)
+      rdiscount (= 2.1.7)
+      redcarpet (= 2.3.0)
+    highline (1.6.21)
+    html-pipeline (1.5.0)
+      activesupport (>= 2)
+      nokogiri (~> 1.4)
+    i18n (0.6.9)
+    jekyll (1.5.1)
       classifier (~> 1.3)
       colorator (~> 0.1)
       commander (~> 4.1.3)
-      liquid (~> 2.5.2)
+      liquid (~> 2.5.5)
       listen (~> 1.3)
-      maruku (~> 0.7.0)
+      maruku (= 0.7.0)
       pygments.rb (~> 0.5.0)
       redcarpet (~> 2.3.0)
-      safe_yaml (~> 0.9.7)
+      safe_yaml (~> 1.0)
       toml (~> 0.1.0)
-    liquid (2.5.4)
+    jekyll-mentions (0.0.9)
+      html-pipeline (~> 1.5.0)
+      jekyll (~> 1.4)
+    jekyll-redirect-from (0.3.1)
+      jekyll (~> 1.4)
+    jekyll-sitemap (0.3.0)
+      jekyll (~> 1.4)
+    jemoji (0.1.0)
+      gemoji (~> 1.5.0)
+      html-pipeline (~> 1.5.0)
+      jekyll (~> 1.4)
+    json (1.8.1)
+    kramdown (1.3.1)
+    liquid (2.5.5)
     listen (1.3.1)
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9)
       rb-kqueue (>= 0.2)
     maruku (0.7.0)
+    mini_portile (0.6.0)
+    minitest (5.4.0)
+    nokogiri (1.6.2.1)
+      mini_portile (= 0.6.0)
     parslet (1.5.0)
       blankslate (~> 2.0)
     posix-spawn (0.3.8)
     pygments.rb (0.5.4)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.1.0)
-    rb-fsevent (0.9.3)
-    rb-inotify (0.9.3)
+    rb-fsevent (0.9.4)
+    rb-inotify (0.9.5)
       ffi (>= 0.5.0)
-    rb-kqueue (0.2.0)
+    rb-kqueue (0.2.3)
       ffi (>= 0.5.0)
+    rdiscount (2.1.7)
     redcarpet (2.3.0)
-    safe_yaml (0.9.7)
-    toml (0.1.0)
+    safe_yaml (1.0.3)
+    thread_safe (0.3.4)
+    toml (0.1.1)
       parslet (~> 1.5.0)
+    tzinfo (1.2.1)
+      thread_safe (~> 0.1)
     yajl-ruby (1.1.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  jekyll (~> 1.4.1)
-  redcarpet (~> 2.3.0)
+  github-pages