Research: static link libsecp256k1

[ashchan]

Embed C module (example: unicorn) instead of using external libsecp26bk1 using ffi.

[ashchan]

@classicalliu Any thoughts? Interested to give it a try?

[classicalliu]

@ashchan Means building native extensions while installing? I'll have a try

[ashchan]

@ashchan Means building native extensions while installing? I'll have a try

Right. Such that the gem doesn't depend on the dynamic linked secp256k1 on the OS. @xxuejie is this understanding correct?