Update README.md

quad/README.md

@@ -4,6 +4,11 @@ The `quad/` directory contains all code that programs the quadcopter. This
 includes any C libraries we have written, any HDL to program the Zybo on
 the quad, and the XSDK main project that runs on the Zybo.
 
+## Documents
+[Zybo Pinout Assignments](doc/zybo_pinout_assignments.md)  
+
+## Software Instructions
+
 The main quad application is written as a library, and located at:
 ```
 src/quad_app/   ("main" function in quad_app.c)