uCXpresso.BLE v1.0.2 rc1 update:
1. Add onError event in bleSerial class to indicate the BLE core error information.
2. Move setTxPowerLevel from bleSerial to bleProximity

ble_multiple example update:
1. Remove onStandby() member from myBLE class.
2. Add onWatchdog() member in myBLE class.
3. Add onError() member in myBLE class.