added a README file

README

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+This is sfpy, another Superfeedr XMPP API Python wrapper. You will need to 
+install xmppy to run it
+
+Example:
+
+    from sfpy.superfeedr import SuperFeedr
+
+    def sf_message(event):
+	print 'received this event: ', str(event)
+	return 1
+
+
+    def main():
+	user = 'user'
+	password = 'password'
+	s = SuperFeedr(user, password)
+	s.on_notification(sf_message)
+	s.monitor() 
+
+    if __name__=='__main__':
+	main()