SASL failure event now includes the failure stanza.

Broke SASL stanzas into separate files.

Fixed typo in feature_bind.

sleekxmpp/features/feature_mechanisms/stanza/auth.py

@@ -0,0 +1,35 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2011  Nathanael C. Fritz
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permission.
+"""
+
+from sleekxmpp.stanza import StreamFeatures
+from sleekxmpp.xmlstream import ElementBase, StanzaBase, ET
+from sleekxmpp.xmlstream import register_stanza_plugin
+
+
+class Auth(StanzaBase):
+
+    """
+    """
+
+    name = 'auth'
+    namespace = 'urn:ietf:params:xml:ns:xmpp-sasl'
+    interfaces = set(('mechanism', 'value'))
+    plugin_attrib = name
+
+    def setup(self, xml):
+        StanzaBase.setup(self, xml)
+        self.xml.tag = self.tag_name()
+
+    def set_value(self, value):
+        self.xml.text = value
+
+    def get_value(self):
+        return self.xml.text
+
+    def del_value(self):
+        self.xml.text = ''