Merge branch 'cmake_source_dir' into 'master'

Use CMAKE_CURRENT_SOURCE_DIR instead of CMAKE_SOURCE_DIR

See merge request !27

CMakeLists.txt

@@ -10,7 +10,7 @@ if("${PROJECT_NAME}" STREQUAL "")
 endif()
 
 # add our macro directory to cmake search path
-set (CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_SOURCE_DIR}/cmake)
+set (CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 set (CMAKE_DEBUG_POSTFIX "d")
 
 # include our cmake files