Fixed comment
Adjusted heading sizes
Define VBAT in Balanduino.h instead of pins_arduino.h, as it just confuses users
A little more verbose error message

Some people don't realize that it's just fine to use the "beta" version
Revert copyright header change
Added note about Spektrum receiver
Bumped year in copyright section
Added link to website and forum
Added information on how to pair with the different controllers
Turn on rumble when the PS4 controller is connected, then indicate battery level using the LED light