ZX

Closes #270

Get stDelegatecallTestHomestead tests to pass

1

- [x] callOutput2 - [x] callOutput3 - [x] callOutput3partial - [x] callOutput3partialFail - [x] callOutput3Fail - [ ] Call1024OOG - [ ] Call1024PreCall - [x] CallcodeLoseGasOOG - [ ] callWithHighValueAndGasOOG...

Get stMemory tests to pass

1

- [x] codeCopyOffset - [x] callDataCopyOffset - [x] codecopy_dejavu2 - [x] calldatacopy_dejavu2 - [x] mem32kb_singleByte - [x] mem32kb_singleByte+31 - [x] mem32kb_singleByte-1 - [x] mem32kb_singleByte-33 - [x] mem64kb_singleByte - [x] mem64kb_singleByte-32...

Verify numeric instructions

8

As per issue #18 parity-wasm checks types for [const operators](https://github.com/paritytech/parity-wasm/blob/ce343b47d4dc7f00df7f4fbc6c54f8a6bcc168c1/src/elements/ops.rs#L163-L166) but not for binary as specified in the [spec](https://webassembly.github.io/spec/core/syntax/instructions.html#syntax-binop). We simulated the stack to check for types and hence we...