Change traits for enemy leaders

[cooljeanius]

The traits I'm adding in PR #43 are mostly for gameplay purposes, and don't make as much sense from a flavor standpoint... @nemaara suggested I create some new traits that do basically the same thing but have a different name, which I think could be worthwhile once I figure out how to do it. That's out-of-scope for that PR, though, so I'm opening this issue to track it separately.

[cooljeanius]

...also... should Rob Roe get an extra trait? He's both an enemy leader, and potentially later an ally...