added raw liquid tag plugin for helping with documentation

plugins/raw.rb

@@ -0,0 +1,24 @@
+# Author: phaer, https://github.com/phaer
+# Source: https://gist.github.com/1020852
+# Description: Raw tag for jekyll. Keeps liquid from parsing text betweeen {% raw %} and {% endraw %}
+
+module Jekyll
+  class RawTag < Liquid::Block
+    def parse(tokens)
+      @nodelist ||= []
+      @nodelist.clear
+
+      while token = tokens.shift
+        if token =~ FullToken
+          if block_delimiter == $1
+            end_tag
+            return
+          end
+        end
+        @nodelist << token if not token.empty?
+      end
+    end
+  end
+end
+
+Liquid::Template.register_tag('raw', Jekyll::RawTag)