added responsive styles from nmec
added responsive styles from nmec

niedzielski/httpstatus.es,citricsquid/httpstatus.es,citricsquid/httpstatuses,citricsquid/httpstatuses,citricsquid/httpstatus.es,citricsquid/httpstatuses,citricsquid/httpstatus.es,fordhurley/httpstatus.es