Add mcrypt and intl extension traffic lights, rename Cake to CakePHP

Added traffic lights for the `mcrypt` and `intl` extensions.  It crossed my mind that the PHP version and extension traffic lights may not be necessary anymore, now that Composer is the accepted installation method of CakePHP. But this may still be helpful/newbie-friendly whenever installing in a good environment, but then moving the application to another environment which may not meet the requirements.