Cucumber should be usable without Capybara

[DylanLacey]

ATM the Cucumber gem can't function without Capybara.

[bootstraponline]

👍 It'd be nice if one day the sauce ruby gem didn't have any dependencies on 3rd party frameworks. There could be extra gems that add in additional support. sauce_ruby would be the 'core' and then there'd be sauce_ruby_capybara, sauce_ruby_cucumber, etc. instead of a big monolithic gem.