refactored Info.plist handling and added comments

src/project.cmake

@@ -1,5 +1,13 @@
+# NOTE: For Windows Inno Setup support, create the following '.iss' file in:
+#  "${CMAKE_CURRENT_SOURCE_DIR}/${PROJECT_NAME}/${PROJECT_NAME}.iss.in"
+
 add_project_library(lib${PROJECT_NAME} "" "" "${PROJECT_ADDITIONAL_SOURCES}")
 
 add_project_executable(${PROJECT_NAME} lib${PROJECT_NAME} lib${PROJECT_NAME})
+if (PROJECT_IS_DARWIN AND EXISTS "${CMAKE_SOURCE_DIR}/${PROJECT_NAME}/Info.plist")
+  set_target_properties(${PROJECT_NAME} PROPERTIES
+    MACOSX_BUNDLE_INFO_PLIST ${CMAKE_CURRENT_SOURCE_DIR}/${PROJECT_NAME}/Info.plist
+  )
+endif()
 
 add_project_test_executable(${PROJECT_NAME}_test lib${PROJECT_NAME} lib${PROJECT_NAME})