Add ADuCRF101 library code from Analog Devices
Add CMSIS library code from ARM
Clean up ADuCRF101 library code for Contiki use
Add initial ADuCRF101 CPU support
Add initial EV-ADuCRF101MKxZ platform support
Add ADuCRF101 radio driver
Fix ADI radio engine driver and add hook for packet reception
Move RF RX into its own process
Add button sensor support (BOOT button)
Add platform LED driver
Implement rtimers for ADuCRF101
Add dummy uart0/uart1 headers that some examples require
Add sniffer support to ADuCRF101

This works with the examples/cc2538dk/sniffer/ project and the
corresponding "sensniff" host-side tool.
Add README.md for ev-aducrf101mkxz platform