More enum work.

src/engine/wpak/PowerEntry.java

@@ -20,7 +20,7 @@ public class PowerEntry {
     public int range;
     public mbEnums.AreaType areaType;
     public int areaRange;
-    public String excludeType;
+    public mbEnums.ExcludeType excludeType;
     public mbEnums.CostType costType;
     public float cost;
     public float difficulty;