The previous pipeline model required a lot of setup and abstracted away
the processing of records. By passing a HandlerFunc to the consumer we
keep the business logic of processing of records closer to the use of
the consumer.
* Add refactoring note and SHA to README
In some cases we'll want to save the data from the stream directly with
no transformation needed. This will allow us to return the raw data
string from the stream
* Add new StringToStringTransformer
* Remove Record from codebase in favor of more generic interface
