translate the ctrlp doc into Chinese

Hello,I translate the ctrlp doc into Chinese to help Chinese people to use this amazing plugin.
But I am not sure whether it is a proper way to add the ctrl_cn.txt under directory /doc,if you want to use a better way,please tell me how to add the Chinese version doc.

sorry，I find when the ctrlp.txt and ctrlp_cn.txt both exists,the helptags command will generate empty tags file,as most people use vundle or pathogen to manage plugins,it will be a problem,could you tell me how to solve this problem?