edit gitignore
remove users
add checkins
add event
add events
replace place_id to event_id in checkin
add welcome page
remove bad migrations
remove erb file
add interface
add many things
remove unusing files
some fixes
Merge branch 'feature/events' into develop

* feature/events:
  some fixes
  remove unusing files
  add many things
  add interface
  remove erb file
  remove bad migrations
  add welcome page
  replace place_id to event_id in checkin
  add events