Rename the 'pygments' option to 'highlighter'.

As recommended by Jekyll 2.0.0

_config.yml

@@ -2,7 +2,7 @@ title:            Site Title
 description:      Describe your website.
 # Your site's domain goes here. Leave localhost server or blank when working locally.
 url:              http://localhost:4000
-disqus_shortname: 
+disqus_shortname:
 
 # Owner/author information
 owner:
@@ -11,26 +11,26 @@ owner:
   bio:            "Describe your self."
   email:          your@email.com
   # Social networking links are used in author-bio sidebar. Update and remove as you like.
-  twitter:        
-  facebook:       
-  github:         
-  stackoverflow: 
-  linkedin:       
-  instagram:      
-  lastfm:         
-  tumblr: 
-  pinterest: 
-  foursquare: 
-  steam: 
-  dribbble: 
+  twitter:
+  facebook:
+  github:
+  stackoverflow:
+  linkedin:
+  instagram:
+  lastfm:
+  tumblr:
+  pinterest:
+  foursquare:
+  steam:
+  dribbble:
   # For Google Authorship https://plus.google.com/authorship
   google_plus:
 
 # Analytics and webmaster tools stuff goes here
-google_analytics:   
-google_verify:      
+google_analytics:
+google_verify:
 # https://ssl.bing.com/webmaster/configure/verify/ownership Option 2 content= goes here
-bing_verify:        
+bing_verify:
 
 # Links to include in top navigation
 # For external links add external: true
@@ -48,7 +48,7 @@ links:
 # http://en.wikipedia.org/wiki/List_of_tz_database_time_zones
 timezone:    America/New_York
 future:      true
-pygments:    true
+highlighter: pygments
 markdown:    kramdown
 
 # https://github.com/mojombo/jekyll/wiki/Permalinks
@@ -62,11 +62,11 @@ kramdown:
   use_coderay: false
 
   coderay:
-    coderay_line_numbers: 
+    coderay_line_numbers:
     coderay_line_numbers_start: 1
     coderay_tab_width: 4
     coderay_bold_every: 10
     coderay_css: class
 
 include: [".htaccess"]
-exclude: ["lib", "config.rb", "Capfile", "config", "log", "Rakefile", "Rakefile.rb", "tmp", "less", "*.sublime-project", "*.sublime-workspace", "test", "spec", "Gruntfile.js", "package.json", "node_modules"]
+exclude: ["lib", "config.rb", "Capfile", "config", "log", "Rakefile", "Rakefile.rb", "tmp", "less", "*.sublime-project", "*.sublime-workspace", "test", "spec", "Gruntfile.js", "package.json", "node_modules"]