pass 'rawPath' page path to plugins

lib/generate/site/index.js

@@ -102,6 +102,7 @@ Generator.prototype.convertFile = function(content, _input) {
 
     var page = {
         path: _input,
+	rawPath: input, // path to raw md file
         content: content,
         progress: parse.progress(this.options.navigation, _input)
     };