You should be able to find a copy of the reference from the website in the 'reference' folder inside your arduino application folder (NOT YOUR SKETCH FOLDER). I am not sure how complete it is, but it is certainly better than nothing 
You should be able to find a copy of the reference from the website in the 'reference' folder inside your arduino application folder (NOT YOUR SKETCH FOLDER). I am not sure how complete it is, but it is certainly better than nothing