Update compatibility notes to version 6.0 and make a link to tag v1.0
Update compatibility notes to version 6.0 and make a link to tag v1.0

femtotrader/Lightstreamer-example-StockList-client-python,Lightstreamer/Lightstreamer-example-StockList-client-python,Weswit/Lightstreamer-example-StockList-client-python