[Exist-open] Dashboard on eXist implementation in Tomcat servlet container

[Jozef A. - X. <Joz...@XM...>]

I managed to generate an exist.war (eXist version is 2.1) using build.bat dist-war (on Windows).
I then deployed it in a Tomcat servlet container (Tomcat version is 7.0). So far so good.

When I then start using http:/...:8080/exist/ I get a 404 error. 
I can however use http:/...:8080/exist/admin/admin.xq to use the admin web administrator.
Using the java admin client, I could load a large number of XML files into the database.

As I now also would like to make the database available to our students for doing XQuery exercises over a web interface, I would also like to install eXide within the database/application. I do however not know how to do that, as the dashboard does not seem to be installed when the war file is deployed in the Tomcat servlet container. 
I noticed there is a dashboard-0-3-8.xar file in the distribution, but how do I install that? Of what I read, xar files can only be imported/deployed using the ... dashboard. So I do have a chicken and egg situation here. 
I checked everything in the admin web administrator and the java admin client, and the documentation for it, but could not find out how to install the dashboard from the xar file without using a dashboard.
Is that possible?

With best regards,

Jozef