Updated README in response to support email.
Updated README in response to support email.

Some users were unaware that they needed to clone the firmware repo and cd into it before running ino tool. This is a clarification.
FarmBot/farmbot-arduino-firmware,FarmBot/farmbot-arduino-controller,TimEvWw/farmbot-arduino-controller,TimEvWw/farmbot-arduino-controller,FarmBot/farmbot-arduino-firmware,FarmBot/farmbot-arduino-controller