Add CykUtil for checking player tank ownership

Projects/TerraTech/TerraTech/CykUtil.cs

@@ -0,0 +1,15 @@
+namespace TerraTech {
+    public class CykUtil {
+        public static bool IsPlayerTank(Module module) {
+            if (module == null)
+                return false;
+            TankBlock block = module.block;
+            if (block == null)
+                return false;
+            Tank tank = block.tank;
+            if (tank == null)
+                return false;
+            return tank.ControllableByLocalPlayer;
+        }
+    }
+}

Projects/TerraTech/TerraTech/TerraTech.csproj

@@ -55,6 +55,7 @@
     <Compile Include="ModuleWheelsManager.cs" />
     <Compile Include="TankBeamManager.cs" />
     <Compile Include="ModuleWeaponManager.cs" />
+    <Compile Include="CykUtil.cs" />
   </ItemGroup>
   <ItemGroup>
     <Reference Include="0Harmony">