Adding an event now has the appropriate % or no-% sign appended, related to #372.  Also removed code obsoleted by #263.
Adding an event now has the appropriate % or no-% sign appended, related to #372.  Also removed code obsoleted by #263.

mercycorps/TolaActivity,mercycorps/TolaActivity,mercycorps/TolaActivity,mercycorps/TolaActivity