added note to symlink vendor libraries

webtools/uninstall_survey/README

@@ -42,6 +42,10 @@ For our example, we would add the line:
 4) Edit /.htaccess.  Add the same RewriteBase line from step 3 directly below the 
 'RewriteEngine On' line.
 
+5) Go to the webroot/js/ directory and run the following two commands:
+    ln -s plotkit-0.8/PlotKit/ plotkit
+    ln -s MochiKit-1.3.1/lib/MochiKit/ mochikit
+