Function add:addcron;modcron;delcron
Merge pull request #14 from cdyue/master

Function add:addcron;modcron;delcron
update parameter in task.py
Merge pull request #15 from cdyue/master

update parameter in task.py
update install.py
Merge pull request #16 from cdyue/master

update install.py
Merge pull request #17 from xubj/master

Merge pull request #4 from dingzg/master
Merge pull request #5 from dingzg/master

get file