Add data version to BukkitImplAdapter.

Also throttle unknown-block warning when loading MCEdit schematics.

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/BukkitServerInterface.java

@@ -67,8 +67,10 @@ public class BukkitServerInterface implements MultiUserPlatform {
 
     @Override
     public int getDataVersion() {
-        // TODO - add to adapter - CraftMagicNumbers#getDataVersion
-        return 1631;
+        if (plugin.getBukkitImplAdapter() != null) {
+            return plugin.getBukkitImplAdapter().getDataVersion();
+        }
+        return 0;
     }
 
     @Override

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/BukkitImplAdapter.java

@@ -40,6 +40,13 @@ import javax.annotation.Nullable;
  */
 public interface BukkitImplAdapter {
 
+    /**
+     * Get the Minecraft data version for the current world data.
+     *
+     * @return the data version
+     */
+    int getDataVersion();
+
     /**
      * Get the block at the given location.
      *