Adds an FAQ entry why the IMU is required in 3D (#328)
Adds an FAQ entry why the IMU is required in 3D (#328)



damonkohler/cartographer_ros,googlecartographer/cartographer_ros,memorysafe/cartographer_ros,cartographer-project/cartographer_ros,googlecartographer/cartographer_ros,cartographer-project/cartographer_ros,wohe/cartographer_ros,memorysafe/cartographer_ros,cartographer-project/cartographer_ros,wohe/cartographer_ros,damonkohler/cartographer_ros,wohe/cartographer_ros,memorysafe/cartographer_ros,damonkohler/cartographer_ros,googlecartographer/cartographer_ros