added a little blurb about include and lib paths, librdkafka, and the PPM.
added a little blurb about include and lib paths, librdkafka, and the PPM.

usdot-jpo-ode/jpo-cvdp,usdot-jpo-ode/jpo-cvdp,usdot-jpo-ode/jpo-cvdp,usdot-jpo-ode/jpo-cvdp