add participants list to event detail page
add participated event list to event index
add leader event list to event index page
improve user info page
improve time in view
fix error message
add footer view
add logout link to event index
improve login/logout link
improve participating event list on event index
improve showing canceled event in event detail page
improve showing past event
improve event detail (comment)
improve participating form (text_area to text_field)
move participate! cancel_participant! method to Participant class
fix event update
fix participate form
Merge pull request #9 from dnond/list_participants

List participants