Object scan in MQTT server uses wrong name source, ignoring export flag

The object scan to find IOs on core devices uses the `__slot__` attribute, which include very private objects. That objects are not accessible by `getattr` - Now we are using `dir()`.
Missing objects from parent classes.
Ignored the export flag from piCtory.

closing #9

revpipyload/mqttserver.py

@@ -167,9 +167,12 @@ class MqttServer(Thread):
         # CoreIOs prüfen und zu export hinzufügen
         lst_coreio = []
         if self._rpi.core:
-            for obj_name in self._rpi.core.__slots__:
+            for obj_name in dir(self._rpi.core):
+                # Scan all non-private objects of the core device
+                if obj_name.find("_") == 0:
+                    continue
                 obj = getattr(self._rpi.core, obj_name)
-                if isinstance(obj, revpimodio2.io.IOBase):
+                if isinstance(obj, revpimodio2.io.IOBase) and obj.export:
                     lst_coreio.append(obj)
 
         # IOs exportieren und Events anmelden

setup.py

@@ -27,7 +27,7 @@ setup(
 
     license="LGPLv3",
     name="revpipyload",
-    version="0.9.7",
+    version="0.9.7a",
 
     scripts=[
         "data/revpipyload",