Return all of a Requester's HITs
        
        Despite what search_hits says, it does not return all hits, but
        instead returns a page of hits. This method will pull the hits
        from the server 100 at a time, but will yield the results
        iteratively, so subsequent requests are made on demand.

def get_all_hits(self):
        """
        Return all of a Requester's HITs
        
        Despite what search_hits says, it does not return all hits, but
        instead returns a page of hits. This method will pull the hits
        from the server 100 at a time, but will yield the results
        iteratively, so subsequent requests are made on demand.
        """
        page_size = 100
        search_rs = self.search_hits(page_size=page_size)
        total_records = int(search_rs.TotalNumResults)
        get_page_hits = lambda(page): self.search_hits(page_size=page_size, page_number=page)
        page_nums = self._get_pages(page_size, total_records)
        hit_sets = itertools.imap(get_page_hits, page_nums)
        return itertools.chain.from_iterable(hit_sets)