Update for github pages real gems

Gemfile

@@ -1,4 +1,3 @@
 source "http://rubygems.org"
 
 gem "github-pages"
-gem "pygments.rb"

Gemfile.lock

@@ -105,11 +105,7 @@ GEM
       mini_portile2 (~> 2.0.0.rc2)
     octokit (4.3.0)
       sawyer (~> 0.7.0, >= 0.5.3)
-    posix-spawn (0.3.11)
     public_suffix (1.5.3)
-    pygments.rb (0.6.3)
-      posix-spawn (~> 0.3.6)
-      yajl-ruby (~> 1.2.0)
     rb-fsevent (0.9.7)
     rb-inotify (0.9.7)
       ffi (>= 0.5.0)
@@ -127,11 +123,9 @@ GEM
       ethon (>= 0.8.0)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
-    yajl-ruby (1.2.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   github-pages
-  pygments.rb

_config.yml

@@ -1,7 +1,7 @@
 ### Global gh-pages pre-amble
 safe: true
 lsi: false
-highlighter: pygments
+highlighter: rouge
 markdown: redcarpet
 redcarpet:
   extensions: ["no_intra_emphasis", "fenced_code_blocks", "autolink", "tables", "with_toc_data"]