Nimble Cleanup

Nimble wasn't handling old config properly, this looks to fix that.

Macro Cleanup

This cleans up a few key issues:

• allowing nested maybeCase macros
• allowing mutation of maybe values from within macros.
• nimble declaration issues.

Now marked as deprecated

First Cut

This has been in a stable state for a while, tagging so nimble can pick it up.

Now marked as deprecated