More PowerEntry parsing work.

src/engine/wpak/PowerEntry.java

@@ -27,4 +27,9 @@ public class PowerEntry {
     public float cast_time;
     public float cool_down;
     public float recycle_time;
+    public int unknown03;
+    public String combatRequirement;
+    public int unknown04;
+    public int unknown05;
+    public String targetRequirement;
 }