Reading through the nRF51822 Beacon reference design it states that there are Keil ARM project files available. Does this mean that the example code given after purchasing the Development kit is Keil ARM compiler dependent or can I use IAR or GCC to compile the example code? Also, the beacon kit would work great for my prototype, would I have all that I need to develope or would I be better off getting the nRF51822 DK?