documentation: Update Readme.md

Readme.md

@@ -16,7 +16,7 @@ MicroCART has 3 areas of development:
     that holds it all together.
 - The ground station
   - The ground station is responsible for issuing important data to the quad
-    (like position data from the camera system), and issues commands to the quad
+    (like position data from the camera system) and issuing commands to the quad
     for things like configuration and path following directives.
 - The Controls Model
   - The quadcopter processor is programmed to implement a PID controller. We use
@@ -32,3 +32,5 @@ MicroCART has 3 areas of development:
 [How to demo the quadcopter](documentation/how_to_demo.md)  
 [How to charge the LiPo batteries](documentation/how_to_charge_lipo.md)  
 
+# Stable Releases
+To browse stable releases from previous teams, view the "Tags" tab above.
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