Pause feature + multi-characteristic discovery.

[ntn-x2]

• It's now also possible to simply pause a BKPeripheral instance, keeping the info about all the connected BKCentrals.

• It's now possible to look for multiple BKCharacteristic associated with a BKService. Delegate methods have been updated accordingly.

[rhummelmose]

This has conflicts

[rhummelmose]

@Diiaablo95 can you fix the build errors and I will merge