Move Meta Byzantium to Finalized

[nicksavers]

Add Meta Byzantium EIP #609 from Alex Beregszaszi to the README.
However that document doesn't link to the actual individual EIPs yet because they haven't been merged.

Also moved individual EIPs to Finalized since that seems to be the convention.
The links for these can be updated when they are merged.

This is complementary to PR #669 from @5chdn which merges EIP #649

[cdetrio]

Closing this in favor of #742 which keeps the Finalized table EIPs in order by number.

[5chdn]

We should also consider merging the following pull requests (all FINAL):

• Create bigint_modexp.md #198 Precompiled contract for bigint modular exponentiation
• REVERT instruction #206 REVERT instruction in the Ethereum Virtual Machine
• Propose RETURNDATACOPY and RETURNDATASIZE. #211 New opcodes: RETURNDATASIZE and RETURNDATACOPY
• Precompiled contract for pairing check. #212 Precompiled contracts for optimal Ate pairing check on the elliptic curve alt_bn128
• Precompiled contracts for addition and scalar multiplication on the elliptic curve alt_bn128 #213 Precompiled contracts for addition and scalar multiplication on the elliptic curve alt_bn128
• New opcode: STATICCALL #214 New opcode STATICCALL
• Embedding transaction status code in receipts #658 Embedding transaction return data in receipts
• EIP-649: Byzantium Difficulty Bomb Delay and Block Reward Reduction #669 Metropolis Difficulty Bomb Delay and Block Reward Reduction