Rename contribution to resource on event model
Use resource instead of contribution on debit_canceled observer
Create dummy model Match
Move event specs to a shared example
Add event specs for match
Change Event#resource to look for matches as well
Remove double quotes from event specs
Remove and_return nil from event spec
Merge pull request #23 from neighborly/jl-match-events

Cancel matches when receive 'debit.canceled' event from Balanced