move notes libs to ext folder, fix a few bugs

it would be nice to take this out of beta, but it still has major issues with image resizing / unable to edit or delete notes

ext/notes/script.js

@@ -4,6 +4,9 @@ $(function() {
 	if(window.notes) {
 		$('#main_image').load(function(){
 			$('#main_image').imgNotes({notes: window.notes});
+
+			//Make sure notes are always shown
+			$('#main_image').off('mouseenter mouseleave');
 		});
 	}