Removed outdated references to goworldwind.org website (#235)

* Removed outdated references to goworldwind.org website

* Modified reference to Tactical Symbols tutorials to include all of them

* Added updated reference to offline usage of tactical symbology

Author: Beak-man

src/config/worldwind.xml

@@ -116,7 +116,7 @@
     <!--<Property name="gov.nasa.worldwind.avkey.UrlProxyType" value="Proxy.Type.Http"/>-->
 
     <!-- Location of icons for MIL-STD-2525C symbol set. This can be a URL to a web server, to a local zip or jar archive.
-See https://goworldwind.org/developers-guide/symbology/tactical-symbols/#offline-use for more information on how
+See https://worldwind.arc.nasa.gov/java/tutorials/tactical-symbols/#offline-use for more information on how
 to configure a local symbol repository.
 Examples: http://myserver.com/milstd2525/   (web server)
     jar:file:milstd2525-symbols.zip!  (local zip archive)  -->

src/gov/nasa/worldwind/data/package-info.java

@@ -311,7 +311,7 @@ GDAL and PROJ4 have been incorporated for MacOSX (Snow Leopard, 64-bit), Windows
 <h3>Deploying with Java Web Start</h3>
  *
     Instructions for using the WorldWind GDAL libraries with a Java Web Start application are available at
- * <a href="https://goworldwind.org/getting-started/" target="_blank">https://goworldwind.org/getting-started/</a>.
+ * <a href="https://worldwind.arc.nasa.gov/java/get-started/" target="_blank">https://worldwind.arc.nasa.gov/java/get-started/</a>.
  *
  * <!--**************************************************************-->
  * <!--********************  Use Case Examples  *********************-->