Added tab to admin with links to available downloadservices. 

The Admin app has a new tab with a list of one or more links to downloadservices admin web application(s).
Link ref and text for html &lt;a&gt; elements are read from a properties file:
&#35; comma separated text and ref 
dllink.text=Downloadservice admin (1),Downloadservice admin (2)
dllink.ref=url-1,url-2