updated LED example to fit changes to API
updated LED example to fit changes to API

mrquincle/nRF51-ble-bcast-mesh,mrquincle/nRF51-ble-bcast-mesh,mrquincle/nRF51-ble-bcast-mesh,ihassin/nRF51-ble-bcast-mesh,ihassin/nRF51-ble-bcast-mesh,mrquincle/nRF51-ble-bcast-mesh