Changes made to Participant and Event to reflect contract changes.  EventTest and ParticipantTest also created.
Synced Event and Participant with contract.  No major changes to functionality.
Merge branch 'master' of https://github.com/dcashman/BillSplit
Fixing UpdateEvent so that it sets the participant values to 0 before updating based on ALL BalanceChanges
Merge branch 'master' of https://github.com/dcashman/BillSplit