message: install package-level documentation
diff: @@ -245,6 +245,10 @@ set (ALL_DIST
  string (REPLACE ";" "\n" ALL_DIST_LINES "${ALL_DIST}")
  file (WRITE ${CMAKE_BINARY_DIR}/dist_manifest.txt ${ALL_DIST_LINES})
  +install (FILES LICENSE README.md THIRD-PARTY-NOTICES
  + DESTINATION ${CMAKE_INSTALL_DATADIR}/mongo-cxx-driver
  +)
  +
  # This is the command that produces the distribution tarball
  add_custom_command (OUTPUT ${DIST_FILE}
  COMMAND ${CMAKE_COMMAND}
  