Document stats-job values delay and ttr in Chinese
Document stats-job values delay and ttr in Chinese

These were left out of a92e3eb9a7b24df917669246815818e5d8efeb4d.

Fixes #305 
Closes #312 

kr/beanstalkd,ifduyue/beanstalkd,wfxiang08/beanstalkd,mickeyouyou/beanstalkd,bmhatfield/beanstalkd,bmhatfield/beanstalkd,ifduyue/beanstalkd,potatosalad/beanstalkd,mickeyouyou/beanstalkd,kr/beanstalkd,wfxiang08/beanstalkd,potatosalad/beanstalkd