- There's a new type: BLE::InitializationCompleteCallback_t
- init() now takes a completion callback. This is an optional parameter, if no callback is setup the application can still determine the status of initialization using BLE::hasInitialized() (see below).
- There's a new API: BLEInstanceBase::hasInitialized() which transports need to implement.
- BLEInstanceBase.h is no longer included from BLE.h. We use a forward declaration of BLEInstanceBase instead. This is required us to move implementations of BLE methods out of the header and into BLE.cpp.
- There's a new API: BLE::getInstanceID(), which simply returns the ID of an instance.
- There are new error types around initialization.
