Allowing arrays to be passed to ab_test
Allowing arrays to be passed to ab_test

If an array is passed to ab_test method, then we select first element
as control and the rest as alternatives

restorando/split,grosser/split,econsultancy/split,nfm/split,reevoo/split,t4deu/split,ccallebs/split,craigmcnamara/split,mezis/split,goodylabs/split,t4deu/split,jdanielnd/split,nfm/split,patbl/split,grosser/split,jmondo/split,mezis/split,nberger/split,nfm/split,econsultancy/split,splitrb/split,patbl/split,WhitehawkVentures/split,jmondo/split,splitrb/split,peterylai/split,splitrb/split,sr-education/split,WhitehawkVentures/split,patbl/split,restorando/split,nberger/split,jdanielnd/split,sr-education/split,goodylabs/split,restorando/split,WhitehawkVentures/split,ccallebs/split,jmondo/split,mezis/split,craigmcnamara/split,t4deu/split,peterylai/split,sr-education/split,grosser/split,peterylai/split,jdanielnd/split,craigmcnamara/split,reevoo/split,ccallebs/split,goodylabs/split