Added mag calibration and interrupt-based data ready

Dependencies:   BLE_API mbed-src nRF51822

Revision:
3:fe46f14f5aef
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nRF51822.lib	Mon Jun 15 21:34:33 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/teams/Nordic-Semiconductor/code/nRF51822/#d0fc349b9a1b