Search between accounts

[unldenis]

#506
Using classes AccountSearchRequest & AccountSearchResponse it works correctly but returns only the first 21 users (the first request) that are searched.
Usage:

        new AccountSearchRequest("something to search").execute(client)
    	.thenAccept(response -> {
    		response.getUsers().forEach(System.out::println);
    	}).join();

So I created the AccountSearchTokenRequest class for requests with rank_token and page_token. But so the class is useless without AccountSearch with which you can get all the 'pages' of the requests with the list of the returned accounts.
Usage:

        AccountSearch as = new AccountSearch(client, "something to search");    
        System.out.println("Total pages: " + as.getTotalPages());
        for(int j = 0; j<as.getTotalPages(); j++) {
        	System.out.println("Page number " + as.getCurrentPageN());
        	as.getCurrentPage().getUsers().forEach(u->System.out.println(u.getUsername()));
        	as.nextPage();    	
        }

[jvogit]

Thanks again for opening a PR.

I've left some comments for you to address, then I think it should be good to go after.

[jvogit]

This functionality is already made possible thru FeedIterators so there might not be enough reason to include this.

If you want you can provide an actions method to do a search in the search actions

[jvogit]

Please change name to UsersSearchRequest (path is users/search/) to fit convention.

Also please combine the two requests together into one class. One can set the rank token and page token through a constructor if needed!

[jvogit]

The name should be changed to UsersSearchResponse for convention.

[unldenis]

another pr comes