Update README.md

Author: micahpearlman

README.md

@@ -47,6 +47,10 @@ ZeroSim provides a multitude of tools for building robots and environments in Un
   * Secure communications via WebSockets.
   * Support for other Physics engines such as Bullet or Havok.
 
+## API Documentation
+
+[API Documentation](https://fsstudio-team.github.io/ZeroSimROSUnity/api/index.html)
+
 ## Getting Started
 
 ### Recommended System
@@ -114,4 +118,4 @@ This will show visualizing the 2D LIDAR and ROS TF in RViz.  This uses a VNC vie
    1. In a browser open http://localhost:8083/vnc.html
    2. Press the "Connect" button. ![noVNC Login](Documentation~/images/novnc_login.png)
 3. In the VNC window press the *LEFT* mouse button and select "Terminal". ![noVNC Terminal](Documentation~/images/novnc_terminal.png)
-4. In the new terminal run `rviz -d ./src/zero_sim_ros/rviz/turtlebot_viewer.rviz`.  RViz will start up with a 3D view with the LIDAR scanner visibile. ![RViz Turtlebot Viewer](Documentation~/images/rviz_turtlebot.gif)
+4. In the new terminal run `rviz -d ./src/zero_sim_ros/rviz/turtlebot_viewer.rviz`.  RViz will start up with a 3D view with the LIDAR scanner visibile. ![RViz Turtlebot Viewer](Documentation~/images/rviz_turtlebot.gif)