Hash JIDs based on full JID string.

This makes JID objects equivalent to strings in dictionaries, etc.

>>> j = JID('foo@example.com')
>>> s = 'foo@example.com'
>>> d = {j: 'yay'}
>>> d[j]
'yay'
>>> d[s]
'yay'
>>> d[s] = 'yay!!'
>>> d[j]
'yay!!'

sleekxmpp/xmlstream/jid.py

@@ -139,3 +139,7 @@ class JID(object):
     def __ne__(self, other):
         """Two JIDs are considered unequal if they are not equal."""
         return not self == other
+
+    def __hash__(self):
+        """Hash a JID based on the string version of its full JID."""
+        return hash(self.full)