Bug 888595: Convert BluetoothManager bindings to WebIDL, r=bzbarsky,echou

This patch converts the BluetoothManager to WebIDL and removes the
old XPIDL bindings. The only user of BluetoothManager is the class
Navigator, which has been adapted to the change.

--HG--
extra : rebase_source : 4bdc77b3923d4ca6ec820c12454a295010382839
Bug 888595: Converted BluetoothAdapter to WebIDL, r=bzbarsky,echou

In addition to converting BluetoothAdapter, this patch also converts
MediaMetaData and MediaPlayStatus to WebIDL. The old XPIDL-based
bindings have been removed.

--HG--
extra : rebase_source : 8a3e25ff89877148d0765b371ebdf77ad33aad75
Bug 888595: Converted BluetoothDevice to WebIDL, r=bzbarsky,echou

We keep the old XPIDL files in place to stay compatible with existing
code. They can probably be removed when all bindings have been converted
to WebIDL.

--HG--
extra : rebase_source : b6612fbd237d89bd02a2fde34e121691be3c0f08