bump development dependency versions and move from webrat to capybara
bump development dependency versions and move from webrat to capybara

blj/radiant,blj/radiant,radiant/radiant,radiant/radiant,radiant/radiant,ahjohannessen/radiant,ahjohannessen/radiant,LytayTOUCH/radiant,LytayTOUCH/radiant,radiant/radiant,ahjohannessen/radiant,ahjohannessen/radiant,blj/radiant,LytayTOUCH/radiant,blj/radiant,LytayTOUCH/radiant