Update integration spec docs
Update integration spec docs

apptentive-engineering/poseidon,SponsorPay/poseidon,airbnb/poseidon,Shopify/poseidon,gjackson12/poseidon,chingor13/poseidon,Tapjoy/poseidon,ListenFirstMedia/poseidon,bpot/poseidon,nepalez/poseidon,codeclimate/poseidon