OS-503: updating opentok sdk install instructions
OS-503: updating opentok sdk install instructions

opentok/one-to-one-sample-apps,jneimantokbox/one-to-one-sample-apps,opentok/one-to-one-sample-apps,opentok/one-to-one-sample-apps,opentok/one-to-one-sample-apps,jneimantokbox/one-to-one-sample-apps,jneimantokbox/one-to-one-sample-apps,jneimantokbox/one-to-one-sample-apps,jneimantokbox/one-to-one-sample-apps