Improve the install include dir option

src/IhtaAddLibrary.cmake

@@ -24,7 +24,7 @@ include_guard ()
 #]=======================================================================]
 macro (ihta_add_library)
 	set (options)
-	set (oneValueArgs NAMESPACE NAME LIBRARY_TYPE INCLUDE_DIR IDE_FOLDER)
+	set (oneValueArgs NAMESPACE NAME LIBRARY_TYPE INCLUDE_DIR INSTALL_INCLUDE_DIR IDE_FOLDER)
 	set (multiValueArgs SOURCES)
 	cmake_parse_arguments (IHTA_ADD_LIB "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
 
@@ -58,7 +58,7 @@ macro (ihta_add_library)
 	# Include Directory
 	target_include_directories (
 		${IHTA_ADD_LIB_NAME} PUBLIC $<BUILD_INTERFACE:${IHTA_ADD_LIB_INCLUDE_DIR}>
-									$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/${IHTA_ADD_LIB_NAME}>
+									$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/${IHTA_ADD_LIB_INSTALL_INCLUDE_DIR}>
 	)
 
 	# Required compiler features