Create a definitive ABI test suite

[axic]

Currently there are a couple of tests scattered around in:

• Solidity
• web3.js
• ethereumjs-abi
• ethjs-abi

It would be nice to create a test suite as JSON files, which can be used by all these implementations to validate against.

cc @SilentCicero

[SilentCicero]

Also: https://github.com/ethers-io/ethers-wallet/blob/master/tests/test-solidity-coder.js from ethers wallet.