New framework: BluezQt

[David Rosca]

Hi all,

BluezQt is a wrapper library for Bluez 5 DBus API. It will be
used in Bluedevil as a replacement for libbluedevil.
It is currently in playground (playground/libs/bluez-qt).

It should be a Tier 1 framework (only depends on Qt libs).

The code should follow all framework policies and the build is green,
so I'd like to submit BluezQt for review.

Thanks,
David