Change the "chia keys sign/ verify" command to use address and/or puzzle hash

[killthrash]

Change the "chia keys sign/ verify" command to use address and/or puzzle hash

Currently, the "chia keys sign/ verify" commands use a public key from a determined hd_path, but the public key output isn't as useful as something like an address or puzzle hash from the public key. Bitcoin and most other projects use addresses when signing and verifying messages. Chia should do the same.