fix: add palette tag during schematic serialization

.gitignore

@@ -5,4 +5,8 @@ build/
 *.ipr
 *.iws
 forge-*-changelog.txt
-out/
+out/
+bin/
+.classpath
+.project
+.settings

build.gradle

@@ -27,8 +27,8 @@ minecraft {
     runDir = "eclipse"
 }
 
-targetCompatibility = '1.6'
-sourceCompatibility = '1.6'
+targetCompatibility = '1.8'
+sourceCompatibility = '1.8'
 
 processResources
         {

src/main/java/org/dimdev/dimdoors/schematic/Schematic.java

@@ -5,6 +5,7 @@ import net.minecraft.block.Block;
 import net.minecraft.nbt.CompressedStreamTools;
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.nbt.NBTTagList;
+import net.minecraft.nbt.NBTTagString;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.world.World;
 
@@ -331,6 +332,11 @@ public class Schematic {
         short[] blockIds = new short[blocks.length];
         reduceToPalette(blocks, blockPalette, blockIds);
 
+        NBTTagList paletteNBT = new NBTTagList();
+        blockPalette.stream().map(NBTTagString::new).forEach(paletteNBT::appendTag);
+
+        schematicTag.setTag("Palette", paletteNBT);
+
         byte[] lowBits = new byte[blocks.length];
         byte[] highBits = new byte[(blocks.length >> 1) + (blocks.length & 1)];
         boolean hasExtendedIDs = encodeBlockIDs(blockIds, lowBits, highBits);