Massive amount of bug/crash fixes, wave saving

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

@@ -53,6 +53,8 @@ public class Save16 extends SaveFileVersion {
         state.wave = wave;
         state.wavetime = wavetime;
 
+        state.spawner.read(stream);
+
         //block header
 
         int blocksize = stream.readInt();
@@ -152,6 +154,8 @@ public class Save16 extends SaveFileVersion {
         stream.writeByte(state.difficulty.ordinal()); //difficulty ordinal
         stream.writeFloat(state.wavetime); //wave countdown
 
+        state.spawner.write(stream);
+
         //--BLOCK HEADER--
 
         stream.writeInt(Block.all().size);