"info: Valid signature from you" might be misinterpreted

Kind of a nit-pick issue but if you sign and encrypt a message to yourself from yourself, and decrypt it, the output says:

```
info: Valid signature from you
```

This might be misinterpreted to mean from the username "you" on keybase. Might be more clear to just use the username of the user in this case or at least put the username in brackets afterward the word "you".

Reproduce the self-signing and self-encryption flow described in the issue, then trace the client entry point that emits the "Valid signature from you" message. Confirm the wording cannot be mistaken for a username, and verify the decrypted output identifies the actual user unambiguously.

Written by the indexing model from the issue text.