i2psnark standalone:

- Add shutdown hook to delete temp dir
- Fix up CSS URL paths to use single quotes
- Don't attempt to register with update manager

apps/i2psnark/java/build.xml

@@ -191,7 +191,9 @@
         <zipfileset src="build/i2psnark.jar" />
         <zipfileset src="../../../core/java/build/i2p.jar" />
         <zipfileset src="../../jetty/jettylib/commons-logging.jar"  />
+      <!-- without this we get a warning about 'no JSP support' but that's it
         <zipfileset src="../../jetty/jettylib/jasper-runtime.jar"  />
+       -->
         <zipfileset src="../../jetty/jettylib/javax.servlet.jar" />
         <zipfileset src="../../jetty/jettylib/jetty-continuation.jar" />
         <zipfileset src="../../jetty/jettylib/jetty-deploy.jar" />
@@ -244,8 +246,8 @@
         </replace>
         <replace dir="build/standalone-resources/.resources/themes/snark"
             summary="true"
-            token="url(&quot;../../console/light/images/"
-            value="url(&quot;/i2psnark/.resources/themes/snark/ubergine/images/" >
+            token="url('../../console/light/images/"
+            value="url('/i2psnark/.resources/themes/snark/ubergine/images/" >
             <include name="**/*.css" />
         </replace>
         <replace dir="build/standalone-resources/.resources/themes/snark"