fix github issue baidu#49 is_alive compatibility

exact division;

for compatibility between py2 and py3

Merge pull request baidu#48 from baidu/py3

Version 3.2.27

Merge pull request baidu#47 from liu0208xuan/master

fix multi new connect coming at same time, epoll lost event

update cup to 3.2.24

enhance 3.2.24

Update ChangeLog.md

Merge pull request baidu#42 from liu0208xuan/master

fix async run dead lock bug

add timeplus and CronTask in services.executor

fix a comatible problem for cup.shell

Update setup.cfg