run tests in PhantomJS by default if browser property is not set, but allow overriding for running on local machine
run tests in PhantomJS by default if browser property is not set, but allow overriding for running on local machine

gerryhocks/redpen,kenhys/redpen,recruit-tech/redpen,gerryhocks/redpen,recruit-tech/redpen,gerryhocks/redpen,redpen-cc/redpen,recruit-tech/redpen,kenhys/redpen,redpen-cc/redpen,redpen-cc/redpen,kenhys/redpen,redpen-cc/redpen,kenhys/redpen,redpen-cc/redpen,gerryhocks/redpen,recruit-tech/redpen