TokenBankChallenge example not working

According to the `mythx-analysis` help text, looks like just running it should run one of the included examples, which one would expect would work out-of-the-box. But it doesn't.
```
$ mythx-analysis
Bad data in analysis-request JSON:
In contract TokenBankChallenge:
* field "debug" is not allowed
``` 

The TokenBankChallenge.json file doesn't seem to even include a debug field anyway.