Add file PyProject;

Support display of a single pubsub node item;
Update document README;
Modularize code;

jabbercard/xmpp/xep_0054.py

@@ -0,0 +1,29 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+from asyncio import TimeoutError
+from slixmpp.exceptions import IqError, IqTimeout, PresenceError
+
+class XmppXep0054:
+
+    async def get_vcard_data(self, jid_bare):
+        try:
+            error = False
+            condition = text = ''
+            iq = await self['xep_0054'].get_vcard(jid_bare)
+        except (IqError, IqTimeout) as e:
+            error = True
+            condition = e.iq['error']['condition']
+            text = e.iq['error']['text']
+            if not text:
+                if condition:
+                    text = 'Could not retrieve vCard'
+                else:
+                    text = 'Unknown Error'
+            iq = ''
+        result = {
+            'error' : error,
+            'condition' : condition,
+            'text' : text,
+            'iq' : iq}
+        return result