SDK 1.4.2.x port
Add uif support
Refactor memory layout
Try to add more curve
gpg 2.2.x handle curves other than ed25519 in a such strange way
that it is very difficult to do such support.
So secp256k1, secp256r1 and brainpoolp256 seems works, but according to gpg
code it works by side effects :-/
Update user documentation for UIF
There is still an issue with ssh authentication with Ed25519. It works with NIST-P256, Brainpool256 curves
