Add QDebug helper for QBluetoothAddress

[ChangeLog][QtBluetooth] Added QDebug helper for QBluetoothAddress

Change-Id: I0d88fb220a8175705e68bec8a87f04a0c4b3b5cc
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>
Replace all occurrences of Q_EMIT with emit

Change-Id: Ieec72048837abe70b0187086b265bcde96c7d6cd
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>
Replace Q_SIGNALS/Q_SLOTS with signals/slots in private headers

This patch fixes private headers accordingly to coding guidelines

Change-Id: Id428e162207a7ae70ccfbcb172d28cab79739818
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>