Changed README.md to provide development info.
Changed README.md to provide development info.

Polidea/RxBluetoothKit,Fitbit/RxBluetoothKit,proxyco/RxBluetoothKit,Polidea/RxBluetoothKit,Polidea/RxBluetoothKit,Fitbit/RxBluetoothKit,proxyco/RxBluetoothKit,Fitbit/RxBluetoothKit