Navio+ driven by Windows PC or Android Tablet?

Is there any way to connect the Navio+ to a full sized motherboard or an Android Tablet instead of using a Rasberry Pi or Odroid-C1 for processing? If so, what is the easiest way to accomplish this?

You can connect it using a bunch of wires: SPI to SPI, I2C to I2C, UART to UART, etc.