Interactions between Tokens and CommandObjects are very screwy

The problems go both ways:
- Tokens creating CommandObjects will lead to missing set symbols and possibly other problems
- CommandObjects creating tokens will lead to missing set symbols and possibly other problems

The core of the issue is that many places in the view code (and possibly engine code) erroneously do something like this:

```
Card source = game.getCard(something.someSourceId);
if (source != null) {
// Do stuff with source
} else {
// Incorrectly does nothing (or even worse, something it shouldn't) even
// though the source might exist and be a CommandObject or Token
}
```

I spotted at least 5 different places in the code where the issue exists, and there's presumably more. Solving this is not _too_ difficult, but it will be a headache to find _all_ of the relevant places where the mistake has been made, because it seems quite widespread.