Update notes for submitted changes

* [fix] Mac compiling Adjusted Makefile for gtest to use compiler variables, Added HOMEBREW vs MACPORT check in configure.ac use as HAS_MACPORTS or HAS_HOMEBREW make clean now will clean gtest correctly. Fixed awk check for cpu cores on darwin to be fast Fixed configure.ac for client to set paths correctly. Added README for mavericks Change-Id: I0118ec60dc2281722acf8691944acc573a1ee5d3