[Seaside] Spec server browser basic functionality working

[Philippe Marschall]

Hi

With the help of Benjamin we could get the basic functionality of the
spec based server browser working.

You have to load Seaside-Pharo-Tools-Spec from [1] (should work with
Seaside 3.0) and then do

WAPharoServerAdapterSpecBrowser open

If you don't have any servers registered you can do so with:

ZnZincServerAdaptor new

Things that aren't working currently:
 * refreshing the server status when pressing buttons
 * status icons
 * adding servers
 * context menu (port, encoding)
 * world menu registration

 [1] http://smalltalkhub.com/mc/Seaside/Seaside31/main

Cheers
Philippe