[tokenizer] recognize the form field (U+0C), drop the carriage return…

… (U+0D)

to be inline with the HTML5 spec

(recognized in cheeriojs/cheerio#242)

lib/Tokenizer.js

@@ -68,7 +68,7 @@ var i = 0,
 
 
 function whitespace(c){
-	return c === " " || c === "\t" || c === "\r" || c === "\n";
+	return c === " " || c === "\n" || c === "\t" || c === "\f";
 }
 
 function Tokenizer(options, cbs){