Merge pull request #25 from William17/cookie-path

cookie path default path /

Merge pull request #24 from William17/fix-default-server

修正 file 协议下默认 server, 提醒用户会关闭的时候会取消订阅所有当次订阅topic

Merge pull request #21 from William17/fix-mistake

fix mistake

Merge pull request #17 from William17/topic-filter

topic filter

rename js sdk