He may have predicted that Apple’s iPad would ‘rule the world’, but the man who invented the notebook concept isn’t happy with Steve Jobs at the moment. Alan Kay is one of the great heroes of the technological revolution we’re still experiencing today. So much so that when Apple introduced the iPad, Jobs took pains to send Kay one as a personal gift. But it isn’t the product that Kay has a problem with – it’s Apple’s determination to control what developers do with it. Apple last week changed the terms of its deal with developers, introducing new clauses which forbid iPhone apps from…