HCSR04 Ultrasonic sensor exposed over BLE

Dependencies:   BLE_API HCSR04 mbed nRF51822

Revision:
0:470a1164da56
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Mon May 09 10:26:40 2016 +0000
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+http://mbed.org/users/mbed_official/code/mbed/builds/aae6fcc7d9bb
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