added the godoc badge
added the godoc badge

tacahilo/gearman-go,mikespook/gearman-go,tacahilo/gearman-go,echa/gearman-go,mikespook/gearman-go,sgrimee/gearman-go,echa/gearman-go,sgrimee/gearman-go,mikespook/gearman-go