Rename parenthesis => brackets and remove injected bracket type
Comment out unused emitter priv methods
Replace REGISTRY hash with a registry object
Extract constants from Emitter into Constants module
Make registry writer private
Add docs for registry
Oops fix registry
Update reek config
Adjust flay
Overwrite default mutant task
Fix documented return values
Update registry to use a class variable

* Rather than creating a private method for the emitter registry, a
  class variable can be used to share state between classes in the
  same hierarchy. Normally I would not use class variables for much,
  except this is exactly the use case they were designed for.
* Add Emitter.finalize to hide the class internal state from the
  outside world. Nothing outside of the Emitter class needs to know
  there is a registry object internally, there is no need to expose
  that in a public interface.
Merge pull request #3 from dkubb/class-variable-emitter-registry

Refactor emitter registry to use a class variable
Fix missing documentation
Fix unnecessary reek warning
Remove duplicate @return specification
Add comment to explain the emitter registry
Add missing magic encoding comments
Change buffer to behave like a stream
Merge pull request #4 from dkubb/change-buffer-to-stream

Change buffer to behave like a stream