initial implementation of jawn support in finch for #45
tested jawn support
changed the package name to be jawn by using the root package to import jawn
made EncodeJawn implicit. DecodeJawn will be trickier
restructured so that the jawn package was under the json package
fixed a spelling error
made support for the JawnDecoder implicit based on @rodrigopr's suggestion
added a readme for the finch-jawn project
Merge #84
Merge branch 'rpless-feature/jawn'