[Bugfix] Fix the event creating code

It tried to associate the event with a user instead of a profile.  It is a regression introduced
by #41

calsocial/__init__.py

@@ -217,7 +217,7 @@ class CalendarSocialApp(Flask):
         form = EventForm()
 
         if form.validate_on_submit():
-            event = Event(user=current_user)
+            event = Event(profile=current_user.profile)
             form.populate_obj(event)
 
             db.session.add(event)