add iBeacon functionality

Dependencies:   BLE_API mbed-dev-bin nRF51822

Fork of microbit-dal by Ken Ogami

Revision:
77:151a3b864991
Parent:
75:739b6a1c1b50
--- a/nRF51822.lib	Mon Jul 17 21:27:47 2017 +0000
+++ b/nRF51822.lib	Mon Jul 17 21:32:11 2017 +0000
@@ -1,1 +1,1 @@
-https://developer.mbed.org/teams/Lancaster-University/code/nRF51822/#a2dc09d1ad27
+https://developer.mbed.org/users/wwbluetooth/code/nRF51822/#809829538041