title: Nightwatch clear browser
body: <p>I have different tests that I would like to launch in clean browser, like on incognito mode with clear localstorages, cookies, sessions and so on. However, it seems that each test runs on the same browser instance. I tried using browser.end() but it doesn't work. The tests should run on phantom driver, so the newest selenium methods for clearing local Storages don't work.</p>