message: Add pinout to Firmware readme
diff: @@ -204,6 +204,8 @@ We also use a tool to generate the Makefile. The steps to do this are as follows
  * Press `Project -> Generate code`
  * You may need to let it download some drivers and such.
  +You will likely want the pinout for this process. It is available [here](https://docs.google.com/spreadsheets/d/1QXDCs1IRtUyG__M_9WruWOheywb-GhOwFtfPcHuN2Fg/edit#gid=404444347)
  +
  ## Setting up Eclipse development environment
  ### Install
  