Cassandra

@MaaxGr Thanks for the helpful example! In case anyone runs into this, I also had to add `return {typing}` from setup() to make it work

Thanks Harrison, this was `chain = load_qa_with_sources_chain(OpenAI(temperature=0), chain_type="stuff")`

Working on Ubuntu 14.04. Thanks!! :) Had to chmod +x /usr/bin/xflux