Use @receiver, which is more readable.
Remove extraneous debugging print statement.
Add new interface for Gobbler (leaving old as well).
Gobbler remembers index of last returned Gobble.
Added an internationalizable representation of a message effect, produced by a check or commit signal receiver. Updated the permissions app to include a proof-of-concept receiver using MessageEffect. Created some (probably incorrect) spanish translations as a proof-of-concept.
Merge pull request #38 from ireynolds/message_effects

Added a model for communicating the effects of a message signal receiver.
Updated MessageEffect to use priority levels instead of a success boolean.
Replaced implementation of OperationBase to make use of MessageEffects. Updated naming conventions for stages. Existing operation implementations no longer work.
Replaced broken imports--tests now run.
Updates before merge with new OperationBase change
Updated StockLevel, StockOut, and FrigeTemperature to use new API