Keyring 417

[spgarbet]

This is the big cut over to using shelter instead of the internal unlockREDCap. It will break local existing keyring stores as it moves to the new format.

This needs careful review before pushing to the main branch.

[couthcommander]

We should have a bridge function that seamlessly transitions a user from "keypass" to "shelter". It would require "keypass" as a suggested package until deprecation. Mark the code with a deprecation date.

[spgarbet]

I really like Cole's idea and will work on implementing.