Install offline node and disable duplicate logging. (#220)

We already show the ROS log on the console.

cartographer_ros/cartographer_ros/CMakeLists.txt

@@ -194,6 +194,7 @@ install(TARGETS cartographer_assets_writer
   LIBRARY DESTINATION ${CATKIN_PACKAGE_LIB_DESTINATION}
   RUNTIME DESTINATION ${CATKIN_PACKAGE_BIN_DESTINATION}
 )
+
 google_binary(cartographer_offline_node
   USES_CARTOGRAPHER
   USES_GFLAGS
@@ -205,3 +206,9 @@ google_binary(cartographer_offline_node
     ros_log_sink
     urdf_reader
 )
+
+install(TARGETS cartographer_offline_node
+  ARCHIVE DESTINATION ${CATKIN_PACKAGE_LIB_DESTINATION}
+  LIBRARY DESTINATION ${CATKIN_PACKAGE_LIB_DESTINATION}
+  RUNTIME DESTINATION ${CATKIN_PACKAGE_BIN_DESTINATION}
+)

cartographer_ros/cartographer_ros/offline_node_main.cc

@@ -210,7 +210,6 @@ void Run(std::vector<string> bag_filenames) {
 }  // namespace cartographer_ros
 
 int main(int argc, char** argv) {
-  FLAGS_alsologtostderr = true;
   google::InitGoogleLogging(argv[0]);
   google::ParseCommandLineFlags(&argc, &argv, true);