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.
Just checked it, no I used the same example/fixture URL like HtmlElementsLive.
`$this->session->visit($_SERVER['WEB_FIXTURE_URL'] . '/tests/QATools/QATools/HtmlElementsLive/Element/index.html');`