Upgrade selenium to version 2.52.0
Upgrade selenium to version 2.52.0

mdmintz/SeleniumBase,seleniumbase/SeleniumBase,ktp420/SeleniumBase,seleniumbase/SeleniumBase,ktp420/SeleniumBase,ktp420/SeleniumBase,possoumous/Watchers,possoumous/Watchers,mdmintz/seleniumspot,mdmintz/SeleniumBase,mdmintz/seleniumspot,mdmintz/SeleniumBase,possoumous/Watchers,mdmintz/SeleniumBase,seleniumbase/SeleniumBase,seleniumbase/SeleniumBase,possoumous/Watchers,ktp420/SeleniumBase