Adding network troubleshooting doc. (#195)

* Adding network troubleshooting doc.

tutorials/pick_and_place/2_ros_tcp.md

 
    - If you are **not** running ROS services in a Docker container, replace the `ROS IP Address` value with the IP address of your ROS machine. Ensure that the `Host Port` is set to `10000`.
 
-   - If you **are** running ROS services in a Docker container, fill `ROS IP Address` and `Override Unity IP Address` with the loopback IP address `127.0.0.1`. Otherwise, leave the `Override Unity IP Address` field empty.
+   - If you **are** running ROS services in a Docker container, fill `ROS IP Address` with the loopback IP address `127.0.0.1` and the `Override Unity IP Address` as your local machine's IP address. Otherwise, leave the `Override Unity IP Address` field empty.
 
    ![](img/2_settings.png)
 

tutorials/ros_unity_integration/README.md

 
 
 ## Tutorials
+- [ROS–Unity Integration: Initial Setup](setup.md) - ROS-Unity Initial Setup
+- [ROS–Unity Integration: Network Description](network.md) - Description of network settings and troubleshooting
 - [ROS–Unity Integration: Publisher](publisher.md) - Adding a Publisher to a Unity Scene
 - [ROS–Unity Integration: Subscriber](subscriber.md) - Adding a Subscriber to a Unity Scene
 - [ROS–Unity Integration: Service](service.md) - Adding a Service call to a Unity Scene

tutorials/ros_unity_integration/network.md

 
 ## If Using Docker
 
-The container will need to be started with the following arguments to forward the ports used for communication between ROS and Unity.
+The container will need to be started with the following arguments to forward the ports used for communication between ROS and Unity. 
 
 `-p 10000:10000 -p 5005:5005`