Change from Mkdocs to slates

docs/lib/multilang.rb

@@ -0,0 +1,16 @@
+module Multilang
+  def block_code(code, full_lang_name)
+    if full_lang_name
+      parts = full_lang_name.split('--')
+      rouge_lang_name = (parts) ? parts[0] : "" # just parts[0] here causes null ref exception when no language specified
+      super(code, rouge_lang_name).sub("highlight #{rouge_lang_name}") do |match|
+        match + " tab-" + full_lang_name
+      end
+    else
+      super(code, full_lang_name)
+    end
+  end
+end
+
+require 'middleman-core/renderers/redcarpet'
+Middleman::Renderers::MiddlemanRedcarpetHTML.send :include, Multilang