ENH: boost lib is often found under the boost include dir

Modules/FindBoost.cmake

@@ -640,6 +640,7 @@ ELSE (_boost_IN_CACHE)
     C:/boost
     "$ENV{ProgramFiles}/boost/boost_${Boost_MAJOR_VERSION}_${Boost_MINOR_VERSION}_${Boost_SUBMINOR_VERSION}/lib"
     "$ENV{ProgramFiles}/boost/boost_${Boost_MAJOR_VERSION}_${Boost_MINOR_VERSION}/lib"
+    ${Boost_INCLUDE_DIR}/lib
     "$ENV{ProgramFiles}/boost"
     /sw/local/lib
   )