Build hack
Update to jk API changes

With recent version of emgost, there is no need to wrap encryption
function call with Buffer().
Show raw key on PEM export page
Adapt to latest API changes.

Keycoder now returns list of Priv instances, no
need for get_curve() and ob.signer() functions.

Add low-quality code to guess which key from store
to use. Thisn need to be rewritten.
Update compiled code