Revert "project-template: use GNUInstallDirs to determin install destionations"

This reverts commit 7eace484.

GNUInstallDirs doesn't really deliver the intended directories. CMAKE_INSTALL_LIBDIR e.g. points to lib/x86_64-linux-gnu on Ubuntu 16.04

cmake/create_cmake_config_files.cmake

@@ -27,8 +27,6 @@
 #
 #######################################################################################################################
 
-include(GNUInstallDirs)
-
 # create variables for standard makefiles
 set(${PROJECT_NAME}_CXX_FLAGS_MAKEFILE "${${PROJECT_NAME}_CXX_FLAGS}")
 
@@ -67,14 +65,14 @@ configure_file(${PROJECT_BINARY_DIR}/cmake/${PROJECT_NAME}-config.in "${PROJECT_
 
 # install cmake find_package configuration file
 install(FILES "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
-  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME} COMPONENT dev)
+  DESTINATION lib/cmake/${PROJECT_NAME} COMPONENT dev)
 install(FILES "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
-  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME} COMPONENT dev)
+  DESTINATION lib/cmake/${PROJECT_NAME} COMPONENT dev)
 
 # install same cmake configuration file another time into the Modules cmake subdirectory for compatibility reasons
 install(FILES "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
-  DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/cmake-${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}/Modules RENAME Find${PROJECT_NAME}.cmake COMPONENT dev)
+  DESTINATION share/cmake-${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}/Modules RENAME Find${PROJECT_NAME}.cmake COMPONENT dev)
 
 # install script for Makefiles
-install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT dev)
+install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config DESTINATION bin COMPONENT dev)