Aux: Install vim-cmake-syntax files with CMake

Auxiliary/CMakeLists.txt

+install(DIRECTORY vim/indent vim/syntax DESTINATION ${CMAKE_DATA_DIR}/editors/vim)
 install(FILES cmake-mode.el DESTINATION ${CMAKE_DATA_DIR}/editors/emacs)
 install(FILES cmake.m4 DESTINATION share/aclocal)
 add_subdirectory (bash-completion)