[Bleeding] Add getWorldType() and getGenerateStructures() methods to Bukkit and Server. Fixes BUKKIT-855

By: Mike Primm <mike@primmhome.com>

paper-api/src/main/java/org/bukkit/Bukkit.java

@@ -102,6 +102,14 @@ public final class Bukkit {
         return server.getServerId();
     }
 
+    public static String getWorldType() {
+        return server.getWorldType();
+    }
+
+    public static boolean getGenerateStructures() {
+        return server.getGenerateStructures();
+    }
+
     public static boolean getAllowNether() {
         return server.getAllowNether();
     }

paper-api/src/main/java/org/bukkit/Server.java

@@ -117,6 +117,20 @@ public interface Server extends PluginMessageRecipient {
      */
     public String getServerId();
 
+    /**
+     * Get world type (level-type setting) for default world
+     *
+     * @return The value of level-type (e.g. DEFAULT, FLAT, DEFAULT_1_1)
+     */
+    public String getWorldType();
+
+    /**
+     * Get generate-structures setting
+     * 
+     * @return true if structure generation is enabled, false if not
+     */
+    public boolean getGenerateStructures();
+
     /**
      * Gets whether this server allows the End or not.
      *