Added text

core/assets/version.properties

@@ -1,7 +1,7 @@
 #Autogenerated file. Do not modify.
-#Wed Mar 21 20:03:34 EDT 2018
+#Wed Mar 21 20:49:05 EDT 2018
 version=release
-androidBuildCode=596
+androidBuildCode=599
 name=Mindustry
 code=3.4
 build=custom build

core/src/io/anuke/mindustry/io/versions/Save16.java

@@ -81,7 +81,7 @@ public class Save16 extends SaveFileVersion {
             int weapons = stream.readByte();
 
             for (int i = 0; i < weapons; i++) {
-                control.upgrades().addWeapon((Weapon) Upgrade.getByID(stream.readByte()));
+                control.upgrades().addWeapon(Upgrade.getByID(stream.readByte()));
             }
 
             ui.hudfrag.updateWeapons();

core/src/io/anuke/mindustry/world/blocks/Blocks.java

@@ -75,6 +75,10 @@ public class Blocks{
 		drops = new ItemStack(Item.iron, 1);
 	}},
 
+	copper = new Ore("copper"){{
+		drops = new ItemStack(Item.copper, 1);
+	}},
+	
 	coal = new Ore("coal"){{
 		drops = new ItemStack(Item.coal, 1);
 	}},