Include example 6 in the file.

README.md

@@ -26,4 +26,5 @@ To help get you get started on your software development, here are examples of n
 2. [Filter Laser Scans](example_2.md) - Publish new scan ranges that are directly in front of Stretch.
 3. [Mobile Base Collision Avoidance](example_3.md) - Stop Stretch from running into a wall.
 4. [Give Stretch a Balloon](example_4.md) - Create a "balloon" marker that goes where ever Stretch goes.
-5. [Get Joint States](example_5.md) - Get joint states of Stretch.
+5. [Print Joint States](example_5.md) - Print the joint states of Stretch.
+6. [Store Effort Values](example_6.md) - Print, store, and plot the effort values of the Stretch robot.