* in the choose swing dialogue, show the opponent's swing die ranges too

* This shows the opponent's range whether or not the opponent has swing dice to set in this round, but i think that's a feature not a bug --- even if the opponent has set a value for this round, you might want to remember what their options are for *next* round and think ahead a bit.
* Fixes #332
* Jenkins: http://jenkins.buttonweavers.com:8080/job/buttonmen-cgolubi1/131/