Added tests for pages via Mink

This tests the whole library and pages without mocking via Mink and the Selenium Driver.
Just now only basic but we can improve them and add more later.
Non PSR-2. You have `TypifiedPageTestCase` class in `TypifiedPageTest.php` file. I guess you meant to name class name `TypifiedPageTest` for it to be picked up by the autoloader and executed as a test.