Generalizing registry, WIP
Merge branch 'rewrite' into rewrite-39
Moved and some changes after review.
Move things around after the general registry came to life.
mid test
Merge branch 'rewrite-39' of github.com:armet/python-armet into rewrite-39
Stopping point for a second
fixed small bug in registry, 100% test coverage on Registry
remove comment bloat
fix pep-8 error
Merge pull request #37 from armet/rewrite-39

Generalize `TranscoderRegistry` to a general registry that indexes objects by attributes