MINIFICPP-304: Update readme to reflect correct lib
MINIFICPP-304: Update readme to reflect correct lib

This closes #201.

Signed-off-by: Aldrin Piri <8746015474cd01110181ed51735247560fd08de4@apache.org>

benqiu2016/nifi-minifi-cpp,achristianson/nifi-minifi-cpp,kevdoran/nifi-minifi-cpp,jdye64/nifi-minifi-cpp,jdye64/nifi-minifi-cpp,jdye64/nifi-minifi-cpp,kevdoran/nifi-minifi-cpp,minifirocks/nifi-minifi-cpp,dtrodrigues/nifi-minifi-cpp,kevdoran/nifi-minifi-cpp,dtrodrigues/nifi-minifi-cpp,NiFiLocal/nifi-minifi-cpp,kevdoran/nifi-minifi-cpp,achristianson/nifi-minifi-cpp,NiFiLocal/nifi-minifi-cpp,apiri/nifi-minifi-cpp,NiFiLocal/nifi-minifi-cpp,phrocker/nifi-minifi-cpp,NiFiLocal/nifi-minifi-cpp,dtrodrigues/nifi-minifi-cpp,phrocker/nifi-minifi-cpp,jdye64/nifi-minifi-cpp,minifirocks/nifi-minifi-cpp,phrocker/nifi-minifi-cpp,apiri/nifi-minifi-cpp,phrocker/nifi-minifi-cpp,phrocker/nifi-minifi-cpp,achristianson/nifi-minifi-cpp,minifirocks/nifi-minifi-cpp,achristianson/nifi-minifi-cpp,jdye64/nifi-minifi-cpp,apiri/nifi-minifi-cpp,apiri/nifi-minifi-cpp,benqiu2016/nifi-minifi-cpp,dtrodrigues/nifi-minifi-cpp,dtrodrigues/nifi-minifi-cpp,kevdoran/nifi-minifi-cpp,minifirocks/nifi-minifi-cpp,benqiu2016/nifi-minifi-cpp,apiri/nifi-minifi-cpp