Added delete calendar events when a project is deleted.
Fixed wrong calendar identifier bug.
Fixed the wrong time range when deleting calendar events in add participation controller.
Fixed wrong order of activity and project names on calendar.
Modified adding events functionality so that past events won’t be added.
Fixed pending count issue.
Replace push segue in pending button with IBAction.
Implemented pending view.
Merge pull request #6 from ChenheliHua/pending

Pending