r61:d0158c65 add ifdef for HRM1017 to choose IRC on btle.cpp
r62:a022be4c Minor improvement to Tsuboi San's pull request.
64:5d5f5cbc Merge pull request from YiHui
bringing in updates from v6.1.0 of the SDK
65:98215c4f3a25 Release 0.1.3

Update to v6.1.0 of Nordic's SDK.

Bugfixes
~~~~~~~~

- Handle all valid disconnection reasons.

Compatible with Release 0.1.1 of the BLE_API.