Fix more includes and move SideInBattle / SiegeInfo into battle

lib/battle/SideInBattle.cpp

@@ -0,0 +1,31 @@
+/*
+ * SideInBattle.cpp, part of VCMI engine
+ *
+ * Authors: listed in file AUTHORS in main folder
+ *
+ * License: GNU General Public License v2.0 or later
+ * Full text of license available in license.txt file, in main folder
+ *
+ */
+#include "../StdInc.h"
+#include "SideInBattle.h"
+#include "../mapObjects/CArmedInstance.h"
+
+SideInBattle::SideInBattle()
+{
+	color = PlayerColor::CANNOT_DETERMINE;
+	hero = nullptr;
+	armyObject = nullptr;
+	castSpellsCount = 0;
+	enchanterCounter = 0;
+}
+
+void SideInBattle::init(const CGHeroInstance * Hero, const CArmedInstance * Army)
+{
+	hero = Hero;
+	armyObject = Army;
+	color = armyObject->getOwner();
+
+	if(color == PlayerColor::UNFLAGGABLE)
+		color = PlayerColor::NEUTRAL;
+}