add carthage badge
add carthage badge

takeshineshiro/AwesomeCache,remzr7/AwesomeCache,remzr7/AwesomeCache,takeshineshiro/AwesomeCache,namanhams/AwesomeCache,aschuch/AwesomeCache,gilesvangruisen/AwesomeCache,alecthomas/AwesomeCache,icepy/AwesomeCache,remzr7/AwesomeCache,RyanTech/AwesomeCache,aschuch/AwesomeCache,gilesvangruisen/AwesomeCache,nickoneill/AwesomeCache,gilesvangruisen/AwesomeCache,nickoneill/AwesomeCache,icepy/AwesomeCache,namanhams/AwesomeCache,RyanTech/AwesomeCache,takeshineshiro/AwesomeCache,icepy/AwesomeCache,nickoneill/AwesomeCache,alecthomas/AwesomeCache,alecthomas/AwesomeCache