Jello Paper as Canonical EVM Spec

[jpitts]

To continue the semver sub-thread here, @axic pointed out EIP-178 for versioning the EVM:

@axic

A similar proposal was made back here: Assigning version numbers to EVM changes · Issue #178 · ethereum/EIPs · GitHub

It comes with some differences:

• only considers EVM,
• because of this goes well with EVM Version Identifier · Issue #154 · ethereum/EIPs · GitHub,
• only uses major/minor in order to save space