[modules] Re-enable nic module + allow widget states

All callback from a widget into a module (e.g. for retrieving the status
or the criticality state) now get a widget passed. This has the purpose
of allowing a module to store state/widget specific data somewhere. This
way, for instance, it is possible to store the interface name as part of
the widget, thus making it possible to show the status of the correct
interface.

bumblebee/output.py

@@ -8,15 +8,22 @@ class Widget(object):
     def __init__(self, obj, text):
         self._obj = obj
         self._text = text
+        self._store = {}
+
+    def set(self, key, value):
+        self._store[key] = value
+
+    def get(self, key, default=None):
+        return self._store.get(key, default)
 
     def state(self):
-        return self._obj.state()
+        return self._obj.state(self)
 
     def warning(self):
-        return self._obj.warning()
+        return self._obj.warning(self)
 
     def critical(self):
-        return self._obj.critical()
+        return self._obj.critical(self)
 
     def module(self):
         return self._obj.__module__.split(".")[-1]
@@ -25,7 +32,7 @@ class Widget(object):
         return self._obj.__module__
 
     def instance(self):
-        rv = getattr(self._obj, "instance")()
+        rv = getattr(self._obj, "instance")(self)
 
     def text(self):
         return self._text