[#970] To invite project member in planner
[#970] To fix a typo
[#971] add events model and controller
[#971] add events model and controller
[#1579] make js support event more than one month
[#1579] add datepicker to change event date
[#1579] remove log message
[#1579] fix event display order
[#1579] fix event display order
[#1627] Fixed disappeared description box bug
[#1648] Fixed some minor errors