added usage restrictions (by the Amazon Webservices license) to the doc string
added usage restrictions (by the Amazon Webservices license) to the doc string

furbrain/Coherence,ismaelgaudioso/Coherence,sreichholf/python-coherence,furbrain/Coherence,opendreambox/python-coherence,unintended/Cohen,opendreambox/python-coherence,sreichholf/python-coherence,ismaelgaudioso/Coherence,coherence-project/Coherence,unintended/Cohen,coherence-project/Coherence