Added link to BLE API Guide.
Added link to BLE API Guide.

evothings/cordova-ble,divineprog/cordova-ble,mikaelkindborg/cordova-ble,mikaelkindborg/cordova-ble,evothings/cordova-ble,divineprog/cordova-ble,mikaelkindborg/cordova-ble,divineprog/cordova-ble,evothings/cordova-ble