New Ring: VM Ring

[bmann]

Please create a "VM Ring".

Purpose: to discuss EVM and eWASM design, improvements, and compatibility. New opcode definition. Keeping Jello / Yellow paper specifications up to date.

cc @gcolvin @expede

[ltfschoen]

Created ring on Discourse: https://ethereum-magicians.org/t/forming-a-ring-vm-ring/2830