I've added the source-file and lib-file tags and get an error when I install the plugin now:

cordova\plugin install com.blackberry.user.identity
Error: Install failed, plugin reversion successful so you should be good to go. Installation issue: Unrecognized plugin.xml element/action in blackberry10 installer: source-file

I am using the latest cordova-blackberry CI build from http://wikis.rim.net/display/bbxwebworks/Continuous+Integration