Add support and templates for "The End"

src/main/java/org/dynmap/DynmapPlugin.java

@@ -168,7 +168,8 @@ public class DynmapPlugin extends JavaPlugin implements DynmapAPI {
     /* Table of default templates - all are resources in dynmap.jar unnder templates/, and go in templates directory when needed */
     private static final String[] stdtemplates = { "normal.txt", "nether.txt", "skylands.txt", "normal-lowres.txt", 
         "nether-lowres.txt", "skylands-lowres.txt", "normal-hires.txt", "nether-hires.txt", "skylands-hires.txt",
-        "normal-vlowres.txt", "skylands-vlowres.txt", "nether-vlowres.txt"
+        "normal-vlowres.txt", "skylands-vlowres.txt", "nether-vlowres.txt", "the_end.txt", "the_end-vlowres.txt",
+        "the_end-lowres.txt", "the_end-hires.txt"
     };
     
     private static final String CUSTOM_PREFIX = "custom-";