refactor: Move tests from thucydides to serenitybdd package
refactor: Create serenitybdd version of WebElementFacade classes/interfaces

Deprecate Thucydides versions, but still handle them correctly
style: fix typo in logging
refactor: PageObject still returns thucydides WebElementFacadeImpl so that can be cast to serenitybdd namespace

This will need to be cleaned up when the thucydides namespace is retired.
Merge pull request #14 from mikezx6r/master

Serenity BDD version of WebElementFacade classes/interfaces