Displays Message if the user has to enable BT
Displays Message if the user has to enable BT

    - message is displayed when BT is off
    - search for SensorTags waits until BT was turned on

Amos2016GroupOne/amos-ss16-proj1,Amos2016GroupOne/amos-ss16-proj1,Amos2016GroupOne/amos-ss16-proj1