More PowerAction parsing work.

src/engine/wpak/PowerActionParser.java

@@ -186,6 +186,7 @@ public class PowerActionParser {
                     powerActionEntry.trackEntry = trackEntry;
                     break;
                 case "Recall": // No arguments for these tags or not parsed
+                case "Summon":
                 case "Teleport":
                 case "TreeChoke":
                 case "SimpleDamage":