Not wanting to nit pick, but I think some warning and/or improvement may be in order in the LoginForm Cookie demo. The demo directly stores the username and password in plaintext cookies. This is not good practice and should not be encouraged via example. For more see:
https://www.troyhunt.com/how-to-build-and-how-not-to-build/
http://security.stackexchange.com/questions/64984/remember-me-cookies-did-i-implement-them-securely
http://security.stackexchange.com/questions/44/how-to-securely-implement-a-remember-me-feature
Edit: Also:
https://paragonie.com/blog/2015/04/secure-authentication-php-with-long-term-persistence#title.2
(Would it be possible to host the demo's on e.g. a github repository? I'd guess lots of people would be happy to submit pull requests for fixes and improvements to the demo applications?)