Update to latest gem versions, remove asciidoc dependency, add sitema…

…p.xml generation support

Gemfile

@@ -1,6 +1,2 @@
 source 'https://rubygems.org'
-gem 'jekyll'
-gem 'jekyll-mentions'
 gem 'github-pages'
-gem 'asciidoctor'
-

Gemfile.lock

@@ -8,7 +8,6 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    asciidoctor (1.5.2)
     blankslate (2.1.2.4)
     celluloid (0.16.0)
       timers (~> 4.0.0)
@@ -17,21 +16,21 @@ GEM
     coffee-script (2.4.1)
       coffee-script-source
       execjs
-    coffee-script-source (1.9.1)
+    coffee-script-source (1.9.1.1)
     colorator (0.1)
-    execjs (2.5.0)
+    execjs (2.5.2)
     fast-stemmer (1.0.2)
     ffi (1.9.8)
     gemoji (2.1.0)
-    github-pages (33)
+    github-pages (34)
       RedCloth (= 4.2.9)
       github-pages-health-check (~> 0.2)
       jekyll (= 2.4.0)
       jekyll-coffeescript (= 1.0.1)
       jekyll-mentions (= 0.2.1)
       jekyll-redirect-from (= 0.6.2)
       jekyll-sass-converter (= 1.2.0)
-      jekyll-sitemap (= 0.6.3)
+      jekyll-sitemap (= 0.8.1)
       jemoji (= 0.4.0)
       kramdown (= 1.5.0)
       liquid (= 2.6.1)
@@ -75,7 +74,7 @@ GEM
       jekyll (~> 2.0)
     jekyll-sass-converter (1.2.0)
       sass (~> 3.2)
-    jekyll-sitemap (0.6.3)
+    jekyll-sitemap (0.8.1)
     jekyll-watch (1.2.1)
       listen (~> 2.7)
     jemoji (0.4.0)
@@ -92,14 +91,14 @@ GEM
     maruku (0.7.0)
     mercenary (0.3.5)
     mini_portile (0.6.2)
-    minitest (5.5.1)
+    minitest (5.6.0)
     net-dns (0.8.0)
     nokogiri (1.6.6.2)
       mini_portile (~> 0.6.0)
     parslet (1.5.0)
       blankslate (~> 2.0)
     posix-spawn (0.3.11)
-    public_suffix (1.5.0)
+    public_suffix (1.5.1)
     pygments.rb (0.6.1)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.2.0)
@@ -124,7 +123,4 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  asciidoctor
   github-pages
-  jekyll
-  jekyll-mentions

_config.yml

@@ -3,14 +3,7 @@ markdown: redcarpet
 redcarpet:
   extensions: ["no_intra_emphasis", "fenced_code_blocks", "autolink", "tables", "strikethrough", "superscript", "with_toc_data"]
 highlighter: pygments
-asciidoc: asciidoctor
-asciidoc_ext: ad,adoc,asciidoc
-asciidoctor:
-  attributes:
-    - hardbreaks!
-    - source-highlighter=pygments
-    - pygments-css=class
-    - pygments-style=perldoc
 gems:
   - jekyll-mentions
+  - jekyll-sitemap
 baseurl: