feat(slam): add cartographer_ros

cartographer_ros/docs/source/index.rst

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+.. Copyright 2016 The Cartographer Authors
+
+.. Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+..      http://www.apache.org/licenses/LICENSE-2.0
+
+.. Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+============================
+Cartographer ROS Integration
+============================
+
+`Cartographer`_ is a system that provides real-time simultaneous localization
+and mapping (`SLAM`_) in 2D and 3D across multiple platforms and sensor
+configurations. This project provides Cartographer's ROS integration.
+
+.. image:: demo_2d.gif
+
+.. toctree::
+   :maxdepth: 2
+
+   compilation
+   demos
+   your_bag
+   algo_walkthrough
+   tuning
+   assets_writer
+   going_further
+   getting_involved
+   configuration
+   ros_api
+   data
+   faq
+
+.. _Cartographer: https://github.com/cartographer-project/cartographer
+.. _SLAM: https://en.wikipedia.org/wiki/Simultaneous_localization_and_mapping