adds 'site-admin' role so admin interface is not open to everyone; special

bootstrapping code, too.

wcs/admin/users.ptl

@@ -17,7 +17,7 @@ from wcs import storage
 from wcs.form import *
 
 def get_user_roles():
-    l = []
+    l = [('site-admin', _('Site Administrator'))]
     for role in storage.get_storage().values('roles'):
         l.append( (role.id, role.name) )
     return l