Added support for PhantomJS and provided ability to pass explicit browser options through to Selenium webdriver implementations.

This pull request is related to a pull request (https://github.com/SeleniumHQ/selenium/pull/13) I've just submitted to SeleniumHQ to allow passing of browser-specific options through to the drivers, and specifically for the purpose of ignoring SSL errors when launching PhantomJS.exe.

I'm submitting this pull request in the hopes of starting a conversation around how to be able to explicitly pass such browser-specific options through Coypu to Selenium.