ethereum/pyethereum — pull request #21 by jamslevy (2014-03-17 03:20:24+00:00)
Title: added != as token in operator mapping

I'm not sure if just adding a new token with an incremented opcode value is the right approach here but I figured I could open a pull request and update my commit with any feedback. The goal is to get the following simple data feed contract compiling:

```
if tx.sender != 'feedowner':
stop
contract.storage[tx.data[0]] = tx.data[1]
```