 add code coverage tools to gemfile
 add code coverage tools to gemfile

RJFryman/commontator,lml/commontator,juanpastas/commontator,lml/commontator,RJFryman/commontator,tbprojects/commontator,tbprojects/commontator,juanpastas/commontator,tbprojects/commontator,juanpastas/commontator,lml/commontator,RJFryman/commontator