Feature request: add support to ed25519 signature

https://en.wikipedia.org/wiki/EdDSA
http://ed25519.cr.yp.to/

as it’s part of OpenSSH since v6.5 (http://www.openssh.com/txt/release-6.5)
Anyone can see the pros of such a choice and there seems to be no cons so far.

+1 need Ed25519