Admin features

Added following functions to the pb.AdminNavigation

    pb.AdminNavigation.add(node)
    pb.AdminNavigation.addChild(parentId, node)

addChild can be called at any time even before the parent tree node exists, this is just in case someone will ever need to do something like this. The navigation will only be built once on startup so the overhead should be really low.

i also added an adminSample Plugin to show off the admin related features.
You are right, im on it. I ran into the problem that getDefaultNavigation requires LS to be present, i now tried:

buildNavigation(pb.LocalizationService);

(this beeing called in isDuplicate which is called by addChild/add in the onStartup of the sample)
shame is the LS is not present at this moment. What do you suggest i could to?

i was thinking of just mocking up the ls for this check since its not required to get all the labels correct.