owner column to events table
add owner to event migration
:owner added to event, assigned to current event.user_id
event, user, has_many through: guests
has_many through fixed
remove dependent destroy on user <-> event
owner to owner_id in events table
event.user changed to event.owner_id
finished changing event.user to event.owner_id, get_event_owner helper
TO DO updated
TO DO updated2
invite guests placeholder on event#show
add event_owner to event.users list (as guest)
remove attr_accessible for user_id in event.rb
comments in event controller
only show events belonging to user
prevent unauthorized event access in event#show controller
pages controller, only show user's events in archive.html.erb
require user_sign_in for #index
sign_in page styling