Revert CMake changes (didn't work for osx anyway)

CMakeLists.txt

@@ -273,7 +273,7 @@ endif(OGRE_STATIC)
 
 include_directories("."
     ${OGRE_INCLUDE_DIR} ${OGRE_INCLUDE_DIR}/Ogre ${OGRE_INCLUDE_DIR}/OGRE ${OGRE_INCLUDE_DIRS} ${OGRE_PLUGIN_INCLUDE_DIRS}
-    ${OGRE_INCLUDE_DIR}/Ogre/Overlay ${OGRE_INCLUDE_DIR}/OGRE/Overlay ${OGRE_Overlay_INCLUDE_DIR}
+    ${OGRE_INCLUDE_DIR}/Overlay ${OGRE_Overlay_INCLUDE_DIR}
     ${SDL2_INCLUDE_DIR}
     ${Boost_INCLUDE_DIR}
     ${PLATFORM_INCLUDE_DIR}

cmake/FindOGRE.cmake

@@ -364,9 +364,6 @@ macro(ogre_find_component COMPONENT HEADER)
   make_library_set(OGRE_${COMPONENT}_LIBRARY)
   findpkg_finish(OGRE_${COMPONENT})
   if (OGRE_${COMPONENT}_FOUND)
-    if (OGRE_${COMPONENT}_INCLUDE_DIR)
-      set(OGRE_${COMPONENT}_INCLUDE_DIRS ${OGRE_${COMPONENT}_INCLUDE_DIR})
-    endif()
     # find binaries
     if (NOT OGRE_STATIC)
       if (WIN32)