reconfigure the storyboard according to actual structure
added ui for My Events page, added files for custom EventCell
added MyEventsViewController class
refactored Event model, added mLocation and mEventImageLink
added init instance method to Event model
draft event page header
add join and change to profile storyboard
resolve conflict, but the Main_iPhone storyboard has static cell issue
added new assets for icons
test some gui for Events page
construct the layout for event cell with image
enhance the join page
resolve conflict about main storyboard