Release of BlueZ 5.20

For non-Android related parts this is mostly a bug-fix release with minor fixes here and there as well as improved handling of PS3 controllers.

On the Android side we’ve now got improved support for GATT, HoG (HID over GATT) and the Multi Profile Specification. There is now also support for the A2DP aptX codec (however due to licensing the codec itself is not part of the source tree).