Start work on gcing cons to cdr-coding
Stash incomplete cdr encoding work
Revert All incomplete cdr encoding work

This reverts commit ba449b481abb682b601036129ed8e4ca46d29980.
This reverts commit f51adf60ff7d72ec2d27fb6587dfe9e55cd286f3.
This reverts commit ba1c56750e37a6e8926882b465e0fc937be5b88a.
Start working on merging boxed and cons