Merge branch 'bugfix/darwin-build-easy-to-find' into 'master'

Move the Darwin binary dir next to Darwin

Closes #16

See merge request !26

CMakeLists.txt

@@ -49,6 +49,7 @@ ExternalProject_Add(Darwin
     GIT_TAG             origin/master
     SOURCE_DIR          "${CMAKE_SOURCE_DIR}/Darwin"
     CMAKE_ARGS          -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR> -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
+    BINARY_DIR          "${CMAKE_SOURCE_DIR}/Darwin.build"
     INSTALL_DIR         "${CMAKE_INSTALL_PREFIX}"
     TEST_AFTER_INSTALL  ON
 )