using dependencyManagement for versioning
making schema registry a typed interface that's no longer tied to avro schemas
moving tracking avsc file to etl-kafka. not the proper place for it, but better than API. means schema registry implementations need not pull in avro for no reason.
add unit tests for avro, file, and memory schema registries
make avro test work
adding a dummy schema registry
fixing file schema registry to move old .latest files to be non-latest
test writing same schema twice
Merge pull request #5 from criccomini/master

Removing Avro dependency for Schema Registry