add testing cases for both client and worker; #4, #8 closed
add testing cases for both client and worker; #4, #8 closed

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