I want to build a USB dongle, so I purchased the nrf24lu1+ development kit. However, in order to program the target board, it would seem that I need the nrfgo. Is this correct? Is there any other way to program the nrf24lu1+? Another question; is the nrf24lu compatible with the nrf51822? I would like to switch between the USB dongle and a cell phone that supports Bluetooth 4.0 if I can.