message: Build system sets value of BOOST_FOUND based on Boost_FOUND.
  Suggested by George Zagaris during code review.
diff: @@ -17,4 +17,4 @@ MESSAGE(STATUS "Boost include dir: " ${Boost_INCLUDE_DIR})
  MESSAGE(STATUS "Boost version: " ${Boost_VERSION})
  # this is what we used to signal boost is on in our build system
  -set(BOOST_FOUND TRUE)
  +set(BOOST_FOUND ${Boost_FOUND})
  