Unsupported Feature

It appears my PGP key doesn't work....

```
$ keybase pgp select
# Algo Key Id Created UserId
= ==== ====== ======= ======
1 256? 33F2A42ED0EA52FB Client4
Choose a key: 1
▶ ERROR ImportKey error: openpgp: unsupported feature: unsupported oid: 2b060104019755010501

$ gpg2 --list-public-keys
./gnupg/pubring.kbx
--------------------------------
pub ed25519 2016-07-30 [SC] [expires: 2019-07-30]
C8B78D3FD199164A2E7543E333F2A42ED0EA52FB
uid [ultimate] Client4
sub cv25519 2016-07-30 [E] [expires: 2019-07-30]

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v2

mDMEV50jrxYJKwYBBAHaRw8BAQdAq3AI4eJYCl9qx49n1wAD5Xy8X6PaOgq3ZePv
V2UTP/i0FUNsaWVudDQgPGVyaWNAdHNpLmlvPoh2BBMWCAAeAhsDBQkFo5qAAh4B
AheABQJXnTDZBAsNCQoDFQoJAAoJEDPypC7Q6lL7B3QA/1K1x8f6gU3lWxyap3dd
unDzgwvFoOinI26RQmrmRejQAP46U5CgtpBzK2H5TR15po5Mcw5NeUS+lsxJIwnK
odeyDLg4BFedI68SCisGAQQBl1UBBQEBB0DUTfDWX4DZep9tjXAJE2nca6fOhHDZ
FAyhtmGuvBcfJQMBCAeIZwQYFggADwUCV50jrwIbDAUJBaOagAAKCRAz8qQu0OpS
+13bAPsFxLGM6RLo8KSspTsi8UlTlzLeDV9XhHviV46euhY/+gD/bLpH6bYEYszQ
YkMZFuCuIAF8zd1hpSsuIM2bjelacAs=
=9bbP
-----END PGP PUBLIC KEY BLOCK-----
```

Start by reproducing the failure with `keybase pgp select` using the provided Ed25519/CV25519 key, and compare it with the `gpg2 --list-public-keys` output. The issue provides no file or test entry point; done would mean selecting this key without the reported unsupported-OID import error.

Written by the indexing model from the issue text.