Fix, also install header files

CMakeLists.txt

@@ -159,11 +159,11 @@ include_directories(
 # )
 
 ## Mark cpp header files for installation
-# install(DIRECTORY include/${PROJECT_NAME}/
-#   DESTINATION ${CATKIN_PACKAGE_INCLUDE_DESTINATION}
-#   FILES_MATCHING PATTERN "*.h"
+install(DIRECTORY include/${PROJECT_NAME}/
+   DESTINATION ${CATKIN_PACKAGE_INCLUDE_DESTINATION}
+   FILES_MATCHING PATTERN "*.h"
 #   PATTERN ".svn" EXCLUDE
-# )
+)
 
 ## Mark other files for installation (e.g. launch and bag files, etc.)
 # install(FILES