Update AUTHORS
examples: Sanitize radio examples' timeouts
examples/radio-broadcaster: Reorganize code & comments
examples/radio-passive-observer: Reorganize code & comments
examples/radio-scannable-broadcaster: Reorganize code & comments
stack: Add delay API
nrf51822: Implement delay module
nrf51822/log: Replace nrf_delay module by delay
examples/ll-scanner: Replace nrf_delay module by delay
nrf51822: Remove nrf_delay.c from sources list
nrf51822: Implement uart module
nrf51822/log: Replace app_uart module by uart
nrf51822: Remove app_uart.c and its dependencies from sources list
nrf51822: Remove app_error_handler() function

This function was needed to handle errors from Nordic SDK via
APP_ERROR_CHECK/APP_ERROR_HANDLER macros.
TODO